Page 1
Edition
04/2022
OPERATING INSTRUCTIONS
SIMOTICS SD
Low Voltage Motors
1LE7
SH 71 ... 315
www.siemens.com/drives
Page 2
Page 3
Introduction
1
SIMOTICS SD
Low-Voltage Motors
1LE7 shaft heights 71 ... 315
Operating Instructions
Safety information
Description
Preparing for use
Installation
Electrical connection
Commissioning
Operation
2
3
4
5
6
7
8
04/2022
A5E51689275A-AA
Maintenance
Spare parts
Disposal
Service & support
Technical data
Quality documents
9
10
11
A
B
C
Page 4
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens Limited
Digital Industries
Motion Control
R&D Technology Centre
Thane Belapur Road
Airoli Node
Navi Mumbai - 400 708
A5E51689275A-AA
P
03/2022 Subject to change
Copyright © Siemens AG 2022.
All rights reserved
Page 5
Table of contents
1 Introduction ........................................................................................................................................... 9
1.1 About these instructions ...................................................................................................... 9
1.2 My support ........................................................................................................................ 10
2 Safety information ............................................................................................................................... 11
2.1 Information for those responsible for the plant or system ................................................... 11
2.2 The 5 safety rules ............................................................................................................... 11
2.3 Qualified personnel ........................................................................................................... 12
2.4 Safe handling .................................................................................................................... 12
2.5 Electromagnetic fields when operating electrical power engineering installations ............... 14
2.6 Electrostatic sensitive devices ............................................................................................ 14
2.7 Electromagnetic compatibility ............................................................................................ 15
2.8 Interference compatibility .................................................................................................. 15
2.9 Influence on the line power supply through a strongly irregular torque ............................... 15
2.10 Interference voltages when operating the converter ........................................................... 16
2.11 Special designs and construction versions .......................................................................... 16
3 Description ........................................................................................................................................... 17
3.1 Area of application ............................................................................................................. 17
3.2 Rating plates ...................................................................................................................... 18
3.3 Installation ........................................................................................................................ 19
3.3.1 Cooling and ventilation ...................................................................................................... 20
3.3.1.1 General ............................................................................................................................. 20
3.3.1.2 Motors with a fan .............................................................................................................. 20
3.3.1.3 Motors without a fan (optional) ......................................................................................... 21
3.3.2 Bearings ............................................................................................................................ 21
3.3.3 Balancing........................................................................................................................... 21
3.3.4 Types of construction/method of installation ...................................................................... 22
3.3.5 Degree of protection .......................................................................................................... 23
3.3.6 Environmental conditions .................................................................................................. 23
3.3.7 Optional built-on and built-in accessories ........................................................................... 23
4 Preparing for use ................................................................................................................................. 25
4.1 Safety-related aspects to consider when configuring the plant ............................................ 25
4.2 Observing the operating mode ........................................................................................... 25
4.3 Motors without final paint coating ..................................................................................... 25
4.4 Delivery ............................................................................................................................. 26
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Table of contents
4.5 Transport and storage ........................................................................................................ 26
4.5.1 Safety instructions for transport ......................................................................................... 26
4.5.2 Transport ........................................................................................................................... 29
4.5.3 Storage ............................................................................................................................. 29
4.5.4 Securing the rotor .............................................................................................................. 31
4.5.5 Commissioning after storage ............................................................................................. 33
4.5.5.1 Insulation resistance and polarization index ....................................................................... 33
4.5.5.2 Regreasing rolling bearings after storage periods of up to two years ................................... 33
4.5.5.3 Releasing the rotor shipping brace before commissioning .................................................. 33
4.6 Ensure adequate cooling .................................................................................................... 34
4.7 Interlock circuit for anti-condensation heating ................................................................... 36
4.8 Noise emission .................................................................................................................. 36
4.9 Voltage and frequency fluctuations during line operation ................................................... 37
4.10 Rotational speed limit values .............................................................................................. 37
4.11 System-inherent frequencies.............................................................................................. 37
4.12 Electromagnetic compatibility ............................................................................................ 38
4.13 Converter operation ........................................................................................................... 39
4.13.1 Parameterizing the converter ............................................................................................. 39
4.13.2 Converter input voltage ..................................................................................................... 39
4.13.3 Reducing bearing currents during operation with converter (low voltage)........................... 40
4.13.4 Insulated bearings for converter operation ......................................................................... 41
4.13.5 Tandem operation ............................................................................................................. 42
5 Installation ........................................................................................................................................... 43
5.1 Safety instructions for installation ...................................................................................... 43
5.2 Preparing for installation .................................................................................................... 44
5.2.1 Requirements for installation ............................................................................................. 44
5.2.2 Insulation resistance .......................................................................................................... 45
5.2.2.1 Insulation resistance and polarization index ....................................................................... 45
5.2.2.2 Checking the insulation resistance ..................................................................................... 45
5.2.3 Preparing the assembly area .............................................................................................. 47
5.2.4 Lift the motor to where it will be mounted and position it .................................................. 47
5.2.5 Motors with type of construction IM B15, IM B9, IM V8 and IM V9 ...................................... 48
5.2.6 Foot mounting .................................................................................................................. 48
5.3 Aligning and fixing the motor ............................................................................................ 49
5.3.1 Measures for alignment and mounting ............................................................................... 49
5.3.2 Flatness of the supporting surfaces for conventional motors ............................................... 50
5.3.3 Motor frame mounting feet (special design) ....................................................................... 50
5.4 Installing the motor ................................
........................................................................... 51
5.4.1 Preconditions for smooth, vibration-free operation ............................................................. 51
5.4.2 Aligning the motor to the driven machine and mounting.................................................... 51
5.4.2.1 Selecting bolts ................................................................................................................... 51
5.4.2.2 Horizontal types of construction with mounting feet .......................................................... 51
5.4.2.3 Horizontal types of construction with flange ...................................................................... 52
5.4.2.4 Vertical types of construction with flange ........................................................................... 53
5.4.3 Removing the rotor shipping brace..................................................................................... 53
5.4.4 Recommended alignment accuracy .................................................................................... 53
5.4.5 Mounting the drive output elements .................................................................................. 54
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4 Operating Instructions, 04/2022, A5E51689275A-AA
Page 7
Table of contents
6 Electrical connection ........................................................................................................................... 57
6.1 Basic rules ......................................................................................................................... 57
6.2 Safety instructions for the electrical connection.................................................................. 58
6.3 Connecting the motor ........................................................................................................ 59
6.3.1 Terminal box ..................................................................................................................... 60
6.3.1.1 Circuit diagram inside the terminal box cover ..................................................................... 60
6.3.1.2 Direction of rotation .......................................................................................................... 60
6.3.1.3 Terminal marking .............................................................................................................. 61
6.3.1.4 Cable entry ........................................................................................................................ 61
6.3.1.5 Versions ............................................................................................................................ 61
6.3.1.6 Protruding connection cables ............................................................................................. 61
6.3.1.7 Connecting protruding cables ............................................................................................ 62
6.3.1.8 Minimum air clearances ..................................................................................................... 62
6.3.2 Cable glands ...................................................................................................................... 63
6.3.3 Tightening torques ............................................................................................................ 65
6.4 Connecting the grounding conductor ................................................................................. 65
6.5 Connecting a temperature sensor/anti-condensation heater ............................................... 66
6.6 Conductor connection ....................................................................................................... 67
6.6.1 Type of conductor connection ............................................................................................ 68
6.6.2 Connecting aluminum conductors ...................................................................................... 68
6.7 Connecting converters ....................................................................................................... 69
6.8 Final checks ....................................................................................................................... 70
7 Commissioning .................................................................................................................................... 71
7.1 Measures before commissioning ........................................................................................ 71
7.1.1 Checks to be carried out prior to commissioning ................................................................. 72
7.1.2 Mechanical and electrical check ......................................................................................... 73
7.1.3 Converter operation ........................................................................................................... 74
7.1.4 Insulation resistance and polarization index ....................................................................... 74
7.1.5 Testing the cooling of the motor ........................................................................................ 74
7.1.6 Commissioning a separately driven fan .............................................................................. 75
7.1.7 Further documents ............................................................................................................ 76
7.1.8 Setpoint values for monitoring the bearing temperature .................................................... 76
7.2 Switching on ..................................................................................................................... 77
8 Operation ............................................................................................................................................. 79
8.1 Safety instructions for operation ........................................................................................ 79
8.1.1 Safety instructions relating to ventilation and cooling ......................................................... 82
8.1.1.1
S
afety instructions for forced ventilation (option) ............................................................... 82
8.1.1.2 Safety instructions when operating motors with fan ........................................................... 82
8.1.1.3 Motors with fan for the textile industry .............................................................................. 82
8.2 Switching on the motor ..................................................................................................... 83
8.3 Deactivating ...................................................................................................................... 83
8.4 Switching on again after an emergency switching-off ......................................................... 83
8.5 Stoppages ......................................................................................................................... 84
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Table of contents
8.5.1 Avoidance of damage to rolling bearings during stoppages ................................................ 85
8.5.2 Decommissioning the motor .............................................................................................. 85
8.5.3 Re-commissioning the motor ............................................................................................. 85
8.6 Faults ................................................................................................................................ 86
8.6.1 Inspections in the event of faults........................................................................................ 86
8.6.2 Electrical faults .................................................................................................................. 86
8.6.3 Mechanical faults ............................................................................................................... 87
8.6.4 Rolling bearing faults ......................................................................................................... 87
8.6.5 Faults on the separately driven fan ..................................................................................... 88
9 Maintenance ........................................................................................................................................ 89
9.1 Preparation and notes ........................................................................................................ 89
9.2 Inspection and maintenance .............................................................................................. 90
9.2.1 Safety instructions for inspection and maintenance ............................................................ 90
9.2.2 Inspections in the event of faults ........................................................................................ 91
9.2.3 First inspection after installation or repair ........................................................................... 91
9.2.4 General inspection ............................................................................................................. 92
9.2.5 Assessing the rolling bearings ............................................................................................ 92
9.2.6 Maintenance intervals ........................................................................................................ 93
9.2.7 Re-greasing ....................................................................................................................... 94
9.2.8 Cleaning ............................................................................................................................ 95
9.2.9 Cleaning the fan cover of motors for the textile industry..................................................... 95
9.2.10 Drain condensate ............................................................................................................... 96
9.2.11 Insulation resistance and polarization index ....................................................................... 96
9.2.12 Servicing the separately driven fan ..................................................................................... 97
9.3 Corrective maintenance ..................................................................................................... 98
9.3.1 Rolling bearings ................................................................................................................. 98
9.3.1.1 Bearing bushes ................................................................................................................ 100
9.3.1.2 Installing bearings ........................................................................................................... 100
9.3.2 Mounting dimension "x" ................................................................................................... 102
9.3.3 Fan .................................................................................................................................. 102
9.3.4 Canopy, encoder under the canopy .................................................................................. 103
9.3.5 Tightening torques .......................................................................................................... 104
9.3.6 Screw lock washers .......................................................................................................... 104
9.3.7 Links ................................................................................................................................ 104
9.3.8 Reassembly: Miscellaneous information ........................................................................... 104
9.3.9 Optional add-on units ...................................................................................................... 105
9.
3.10 O-ring seal ....................................................................................................................... 105
9.3.11 Encoder ........................................................................................................................... 106
9.3.12 Grounding brush ............................................................................................................. 106
10 Spare parts ......................................................................................................................................... 107
10.1 Part lists ........................................................................................................................... 107
10.2 Exploded drawings .......................................................................................................... 108
11 Disposal ............................................................................................................................................. 113
11.1 RoHS - restricting the use of certain hazardous substances ............................................... 113
11.2 Information according to Article 33 of the REACH regulation ............................................ 114
11.3 Preparing for disassembly ................................................................................................ 114
11.4 Dismantling the motor ..................................................................................................... 114
11.5 Disposal of components ................................................................................................... 115
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6 Operating Instructions, 04/2022, A5E51689275A-AA
Page 9
Table of contents
A Service & support ............................................................................................................................... 117
A.1 Siemens Service Center (Kalwa) ....................................................................................... 117
A.2 Siemens Industry Online Support ..................................................................................... 117
A.3 Further documents .......................................................................................................... 118
B Technical data .................................................................................................................................... 119
B.1 Configurator for drive technology .................................................................................... 119
B.2 Tightening torques .......................................................................................................... 119
B.2.1 Tightening torques for screw and bolt connections ........................................................... 119
B.2.2 Terminal board and grounding ......................................................................................... 120
B.2.3 Terminal boxes, end shields, grounding conductors, sheet metal fan covers ..................... 120
B.2.4 Tightening torques for electrical connections of monitoring equipment and anti-
condensation heating ...................................................................................................... 121
B.2.5 Tightening torques for cable glands ................................................................................. 121
B.3 Technical data and drawings ............................................................................................ 122
B.3.1 Terminal box dimensions ................................................................................................. 122
B.3.2 Arrangement of the auxiliary terminal box ....................................................................... 123
C Quality documents ............................................................................................................................ 125
C.1 Quality documents SIMOTICS in SIOS ............................................................................... 125
Index .................................................................................................................................................. 127
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Table of contents
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8 Operating Instructions, 04/2022, A5E51689275A-AA
Page 11
1
Note
The note provides you with additional inf
product - and the relevant documentation.
Introduction
1.1 About these instructions
These instructions describe the motor and explain how to handle it, from initial delivery to
final disposal of the equipment. Keep these instructions for later use.
Read these operating instructions before you handle the motor and follow the instructions to
become familiar with its design and operating principles and thus ensure safe, problem-free
motor operation and long service life.
Safety instructions and handling-related warning notes are provided in these instructions.
When carrying out any activity at or with the motor, carefully comply with all of these notes
for your own safety, to protect other people and to avoid material damage.
Please contact the Service Center if you have any suggestions on how to improve this
document.
Text format features
You can find the following text format features in these instructions:
1. Handling instructions are always formatted as a numbered list. Always perform the steps in
the order given.
• Lists are formatted as bulleted lists.
– Lists on the second level are hyphenated.
ormation about the product itself, handling the
1LE7 shaft heights 71 ... 315
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Page 12
Introduction
Note
If you want to use this function, you must register once.
Later, you can log on with your login data.
1.2 My support
1.2 My support
mySupport
Extensive assistance and more information can be found under the following link:
My Support Links and Tools
(https://support.industry.siemens.com/my/ww/en/documentation)
You can individually compile your personal library, e.g. for your documentation based on
Siemens content, and adapt it for your own motor documentation.
To do so, click "My Documentation".
You can create your own personal library under "mySupport" using the following procedure.
Precondition
You have registered for and logged on to "Siemens Industry Online Support", hereinafter
referred to as "SIOS".
SIOS (https://support.industry.siemens.com/cs/ww/en/)
Procedure for creating a personal library
1. Open SIOS and log on.
2. Enter the product you are looking for under "Search for product info" and press "Enter".
3. Select the doc. class you want, e.g. "Manual", under "Entry type".
4. Click on your desired manual under the entries.
5. Click on "Add to mySupport documentation".
6. Enter a title.
7. Press "OK".
❒
The selected manual can be found under "mySupport". To find further functions, click on the
icon located to the right of the document.
In this way, you can create your own library and quickly access your documentation.
1LE7 shaft heights 71 ... 315
10 Operating Instructions, 04/2022, A5E51689275A-AA
Page 13
2
Note
Use the services and support provided by the local service center for planning, installation,
commissioning and service work.
Safety information
2.1 Information for those responsible for the plant or system
This motor has been designed and built in accordance with the specifications contained in
Directive 2014/35/EU ("Low-Voltage Directive") and IS 12615, and is intended for use in
industrial plants. Please observe the country-specific regulations when using the motor
outside India. Follow the local and industry-specific safety and setup regulations.
The persons responsible for the plant must ensure the following:
• Planning and configuration work and all work carried out on and with the motor is only to
be done by qualified personnel.
• The operating instructions must always be available for all work.
• The technical data as well as the specifications relating to the permissible installation,
connection, ambient and operating conditions are taken into account at all times.
• The specific setup and safety regulations as well as regulations on the use of personal
protective equipment are observed.
2.2 The 5 safety rules
To ensure your own personal safety as well as to avoid material damage, always comply with
the safety-relevant instructions when carrying out any work. Also carefully comply with the 5
safety rules according to EN 50110-1 "Working in a no-voltage state" in the specified
sequence.
5 safety rules
1. Disconnect the system.
Also disconnect the auxiliary circuits, for example, anti-condensation heating.
2. Secure against reconnection.
3. Verify absence of operating voltage.
4. Ground and short-circuit.
5. Provide protection against adjacent live parts.
To energize the system, apply the measures in reverse order.
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Page 14
Safety information
2.3 Qualified personnel
2.3 Qualified personnel
All work at the motor must be carried out by qualified personnel only. For the purpose of this
documentation, qualified personnel is taken to mean people who fulfill the following
requirements:
• Through appropriate training and experience, they are able to recognize and avoid risks
and potential dangers in their particular field of activity.
• They have been instructed to carry out work on the motor by the appropriate person
responsible.
2.4 Safe handling
Workplace safety depends on the attentiveness, care, and common sense of the personnel
who install, operate, and maintain the motor. In addition to the safety measures cited, as a
matter of principle, the use of caution is necessary when you are near the motor. Always pay
attention to your safety.
Also observe the following to prevent accidents:
• General safety regulations applicable in the country where the motor is deployed.
• Manufacturer-specific and application-specific regulations
• Special agreements made with the operator
• Separate safety instructions supplied with the motor
• Safety symbols and instructions on the motor and its packaging
Danger as a result of stationary parts under voltage (live parts)
Live parts represent a hazard. Touch protection against active (live) parts is no longer
guaranteed if covers are removed. The minimum clearance and creepage distances may be
violated when coming close to live parts. Touching or coming close to them can result in
death, serious injury or material damage.
• Ensure that all live parts are suitably covered.
• Switch off and disconnect the motor first if you want to remove covers. Observe the "5
safety rules" (Page 11).
Risk of injury due to rotating parts
Rotating parts are dangerous. Touch protection against rotating parts is no longer guaranteed
if covers are removed. Touching rotating parts can result in death, serious injury or material
damage.
• Ensure that all rotating parts are reliably covered.
• Switch off and disconnect the motor first if you want to remove covers. Observe the "5
safety rules" (Page 11).
• Only remove covers when the rotating parts have come to a complete standstill.
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12 Operating Instructions, 04/2022, A5E51689275A-AA
Page 15
Safety information
2.4 Safe handling
Risk of burns due to hot surfaces
Individual motor parts can become hot in operation. Burns can result when coming into
contact with these parts.
• Never touch motor parts during operation.
• Allow the motor to cool before starting work on the motor.
• Check the temperature of parts before touching them. If required, wear suitable protective
equipment.
Health hazard due to chemical substances
Chemical substances required for the setup, operation and maintenance of motors can
present a health risk.
• Observe the product information provided by the manufacturer.
Flammable substances hazard
Chemical substances required for the setup, operation and maintenance of motors may be
flammable. These substances can ignite if handled incorrectly. They can cause burns and
property damage.
Noise emissions
• Observe the product information provided by the manufacturer.
During operation, the motor's noise emission levels can exceed those permitted at the
workplace, which can cause hearing damage.
• Ensure that nobody is in the area of increased noise emissions during motor operation.
• Take steps to reduce noise so that the motor can be operated safely within your system.
The following measures may help to reduce noise.
– Covers
– Noise insulation
– Hearing protection measures
Prevention of hearing damage
If the permissible sound pressure level is exceeded, hearing damage can occur when
operating three-phase motors at their rated power. The permissible sound pressure level is
70 dB (A).
1LE7 shaft heights 71 ... 315
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Page 16
Safety information
2.5 Electromagnetic fields when operating electrical power engineering installations
2.5 Electromagnetic fields when operating electrical power
engineering installations
Electrical power equipment generate electromagnetic fields during operation. Potentially
lethal malfunctions can occur in medical implants, e.g. pacemakers, in the vicinity of
electrical power equipment. Data may be lost on magnetic or electronic data carriers.
• Protect the personnel working in the plant by taking appropriate measures, such as
erecting identifying markings, safety barriers and warning signs and giving safety talks.
• Observe the nationally applicable health and safety regulations.
• It is forbidden for people with pacemakers to be close to the motor.
• Do not carry any magnetic or electronic data media.
2.6 Electrostatic sensitive devices
Material damage due to electrostatic discharge
Electronic modules contain components that can be destroyed by electrostatic discharge.
These components can be damaged or destroyed if they are not handled correctly. To protect
equipment against damage, follow the instructions given below.
• Only touch electronic modules if you absolutely have to work on them.
• The body of the person concerned must have been electrostatically discharged and
grounded immediately before any electronic modules are touched.
• Electronic modules should not be brought into contact with electrically insulating
materials, such as:
– Plastic film
– Plastic parts
– Insulating table supports
– Clothing made of synthetic fibers
• Always place electrostatic sensitive devices on conductive bases.
• Always pack, store and transport electronic modules or components in conductive
packaging, such as:
– Metallized plastic or metal containers
– Conductive foam material
– Domestic aluminum foil
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Safety information
a = conductive floor surface
b = ESD table
c = ESD shoes
d = ESD overall
e = ESD wristband
f = cabinet ground connection
2.7 Electromagnetic compatibility
The ESD protective measures required for components that can be destroyed due to
electrostatic discharge are shown in the following drawings:
2.7 Electromagnetic compatibility
This motor is designed in accordance with IEC/EN 60034, and when used as specified, it
complies with the requirements of European Directive 2014/30/EU regarding Electromagnetic
Compatibility.
2.8 Interference compatibility
By selecting suitable signal cables and evaluation units, ensure that the interference
immunity of the motor is not diminished.
2.9 Influence on the line power supply through a strongly irregular
torque
A strongly irregular torque, for example with the drive of a reciprocating motor, forces a nonsinusoidal motor current. The emerging harmonics can have an impermissible influence on
the line power supply via the connection lines.
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Safety information
2.10 Interference voltages when operating the converter
2.10 Interference voltages when operating the converter
When a converter is in operation, the emitted interference varies in strength depending on
the converter (manufacturer, type, interference suppression measures undertaken). On
motors with integrated sensors (e.g. PTC thermistors), interference voltages caused by the
converter may occur on the sensor lead. This can cause faults which can result in eventual or
immediate death, serious injury or material damage.
• Comply with the EMC information provided by the manufacturer of the converter. This is
how you prevent the limit values stipulated by IEC/EN 61000-6-2 .... IEC/EN 61000-6-4 for
the drive system (consisting of the motor and converter) from being exceeded.
• You must put appropriate EMC measures in place.
2.11 Special designs and construction versions
Before carry out any work on the motor, determine the motor version.
If there are any deviations or uncertainty, contact the manufacturer, specifying the type
designation and serial number (see the rating plate), or contact the Service Center.
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Page 19
3
WARNING
Note
Motor directive
Low-voltage motors are components designed for installation in machines in accordance with
the current Machinery Directive. Commissioning is prohibited until it has been absolutely
identified that the
EN / IEC 60204-1.
Description
3.1 Area of application
Risk of explosion
This motor is not designed for use in hazardous areas. An explosion can occur if the motor is
operated in these areas. This can result in death, serious injury or material damage.
• Never operate this motor in hazardous areas.
The rotating electrical motors of this series are used as industrial drives. They are designed for
a wide range of drive applications both for line operation as well as in conjunction with
frequency converters. They are characterized by their high power density, extreme
robustness, long service life and outstanding reliability.
Correct and intended use of the motors
These motors are intended for industrial installations. They comply with the harmonized
standards of the series EN / IEC 60034 (VDE 0530). It is prohibited to use these motors in
hazardous zones if the marking on the motor rating plate does not explicitly permit line or
converter operation. If other/more wide-ranging demands (e.g. protection so that they
cannot be touched by children) are made in special cases – i.e. use in non-industrial
installations – these conditions must be ensured by the customer.
end product is in conformance with this Directive. Comply with standard
Use of motors without CE marking
Motors without CE marking are intended for operation outside the European Economic Area
(EEA). Do not use any motors without a CE marking in the EEA!
Using motors without UKCA marking
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Operating Instructions, 04/2022, A5E51689275A-AA
Do not use any motors without UKCA marking in Great Britain (England, Wales and Scotland).
17
Page 20
Description
Item
Description
Item
Description
General data
Electrical data
1
Type of motor
31
Electrical data
2
Motor type
33
Rated voltage V
3
Serial number (incl. date of manufacture YY.MM)
34
Winding connections
4
Standards
35
Frequency Hz
5
Additional details (optional)
36
Rated power kW
6
Customer data (optional)
37
Rated current A
7
Country of origin
38
Power factor cosφ
9
Identification number of testing agency (optional)
39
Rated speed rpm
49
Company logo
40
Efficiency class
54
Crossed wheeled bin
41
Efficiency
55
ISI mask
Mechanical data
11
Frame size
17
Installation altitude (only if higher than 1000 m)
12
Type of construction
19
Bearing sizes
13
Degree of protection
20
Relubrication data/specifications (optional)
14
Motor weight kg
21
Brake data (optional)
15
Temperature class
24
Feather key arrangement
16
Ambient temperature range (optional)
3.2 Rating plates
3.2 Rating plates
Rating plate
The rating plate shows the identification data and the most important technical data. The
data on the rating plate and the contractual agreements define the limits of proper usage.
Data on the rating plate
1LE7 shaft heights 71 ... 315
18 Operating Instructions, 04/2022, A5E51689275A-AA
Page 21
Description
Feature
Standard
Dimensioning and operating behavior
EN / IEC 60034-1
IS 12615,
IS/IEC 60034-1
rotating electrical motors and inspections
Degree of protection
EN / IEC 60034-5
IS/IEC 60034-5
Cooling
EN / IEC 60034-6
-
Type of construction
EN / IEC 60034-7
IS 2253
Dimensions of three-phase foot-mounted induction motors
-
IS 1231
Dimensions of three-phase flange-mounted induction motors
-
IS 2223
Terminal markings and direction of rotation
EN / IEC 60034-8
IS/IEC 60034-8
Starting characteristics of rotating motors
EN / IEC 60034-12*
IS 12615
Vibration severity grades
EN / IEC 60034-14
IS 12075
Efficiency classification of three-phase squirrel-cage induction
motors
EN / IEC 60034-30-1
IS 12615
IEC standard voltages
IEC 60038
IS 12360
Code of practice for earthing
-
IS 3043
Code of practice for installation and maintenance of induction
motors
-
IS 900
*
the catalog.
3.3 Installation
3.3 Installation
The regulations and standards used as the basis for designing and testing this motor are
stamped on the rating plate. The motor design basically complies with the following
standards:
Table 3- 1 Applicable general regulations
Procedure for determining the losses and the efficiency of
For ratings with higher Si/Pn ratio than the specified values in IEC 60034-12 for NE design, refer to
EN / IEC 60034-2-1 IS 12615
1LE7 shaft heights 71 ... 315
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Description
3.3 Installation
3.3.1 Cooling and ventilation
3.3.1.1 General
The motors of this series have a closed primary (internal) cooling circuit and an open
secondary cooling circuit (surface cooling). The surface cooling varies depending on the
version.
3.3.1.2 Motors with a fan
Self-ventilation (standard): Cooling method IC 411 according to EN / IEC 60034-6
Located at the ND end of the stator housing is an air intake cowl that guides the external air
on its way to the motor. The external air is drawn in through openings in the air intake cowl
and flows axially across the outer cooling ribs of the motor frame. The fan wheel for the
external flow of cooling air is attached to the motor shaft.
The fan wheels are bidirectional.
Check the cooling effect below rated speed in the case of frequent switching or braking – or
if the speed is controlled continually below the rated speed.
Forced ventilation (optional): Cooling method IC 416 according to EN / IEC 60034-6
Cooling that does not depend on the speed is achieved by means of a unit that is
independent of the motor operating state (forced ventilation). This unit is closed to the
outside by a fan cover. It has its own main drive with fan impeller which creates the cooling
air flow required for cooling the motor.
1LE7 shaft heights 71 ... 315
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Description
3.3 Installation
3.3.1.3 Motors without a fan (optional)
Surface cooling by free convection: Cooling method IC 410 according to EN / IEC 60034-6
Surface cooling by relative movement of cooling air: Cooling method IC 418 according to
EN / IEC 60034-6
3.3.2 Bearings
In order to support the motor shaft and maintain its position in the non-moving part of the
motor, only two rolling bearings are used. One rolling bearing performs the function of a
location bearing that transfers axial and radial forces from the rotating motor shaft to the
non-moving part of the motor. The second rolling bearing is implemented as a floating and
support bearing in order to allow thermal expansion inside the motor and transfer radial
forces.
The nominal (calculated) useful life of the bearings according to ISO 281 is at least 50,000
hours if the motor is coupled via a direct flexible coupling. However, the achievable useful life
of the bearings can be significantly longer in the case of lower forces (e.g. operation with
self-aligning couplings).
Rolling bearings with permanent lubrication are maintenance-free.
The motor is equipped with grease-lubricated rolling bearings.
• In the standard version, the bearings of motors up to shaft height 200 are permanently
lubricated.
• The bearings of motors from shaft height 225 and above are equipped with a button head
grease nipple.
3.3.3 Balancing
As standard, the motor is designed with vibration severity level A. The rotor is dynamically
balanced with a half feather key (code "H").
Vibration severity level B can be ordered as option, and stamped on the rating plate.
1LE7 shaft heights 71 ... 315
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Page 24
Description
tion code
installation
IM B3 (IM 1001)
IM V5 (IM 1011)
IM V6 (IM 1031)
IM B6 (IM 1051)
IM B7 (IM 1061)
IM B8 (IM 1071)
IM B5 (IM 3001)
IM V1 (IM 3011)
IM V3 (IM 3031)
IM B14 (IM 3601)
IM V18 (IM 3611)
IM V19 (IM 3631)
IM B35 (IM 2001)
IM B34 (IM 2101)
3.3 Installation
3.3.4 Types of construction/method of installation
The type of construction of the motor is stated on the rating plate.
Table 3- 2 Type of construction
Basic type of construc-
Diagram Other methods of
Diagram
1LE7 shaft heights 71 ... 315
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Description
Ambient temperature
-20 °C to +50 °C
Installation altitude
≤ 1000 m
Air with normal oxygen content, usually
21 % (V/V)
Note
Further documents
Observe all of the other documents provided with this motor.
3.3 Installation
3.3.5 Degree of protection
The motor has a type of protection as stamped on the rating plate, and can be installed in
dusty or humid environments.
3.3.6 Environmental conditions
Limit values for the standard version
The standard motors are not suitable for use in corrosive atmospheres, atmospheres with a
high salt content, or outdoor applications.
Limit values for the special versions
If the environmental conditions are different from the details listed here, then the values on
the rating plate or in the catalog will apply.
3.3.7 Optional built-on and built-in accessories
Motors can be equipped with the following integrated components/devices:
• Temperature sensors integrated in the stator winding in order to monitor the temperature
and protect the stator winding from overheating.
• Anti-condensation heating for motors whose windings are subject to a risk of
condensation due to the climatic conditions.
Motors can be equipped with the following mounted components/devices:
• Brake
• Rotary pulse encoder
• Separately driven fan (forced ventilation)
• Measuring nipple for SPM shock pulse measurement for bearing monitoring
Supplementary devices
Depending on the order, various supplementary devices can be installed or mounted. These
include sensors for bearing temperature monitoring or winding monitoring, for example.
1LE7 shaft heights 71 ... 315
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Description
3.3 Installation
1LE7 shaft heights 71 ... 315
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4
Preparing for use
Good planning and preparation of motor applications are essential in terms of keeping
installation simple and avoiding errors, ensuring safe operation, and allowing access to the
motor for servicing and corrective maintenance.
This chapter outlines what you need to consider when engineering/configuring your plant in
relation to this motor and the preparations you need to make before the motor is delivered.
4.1 Safety-related aspects to consider when configuring the plant
A number of residual risks are associated with the motor. These are described in Chapter
"Safety information (Page 11)" and related sections.
Take appropriate safety precautions (covers, barriers, markings, etc.) to ensure the motor is
operated safely within your plant.
4.2 Observing the operating mode
Observe the motor's operating mode. Use a suitable control system to prevent overspeeds,
thus protecting the motor from damage.
4.3 Motors without final paint coating
For motors, which are only delivered with primer, you must paint them to comply with the
applicable guidelines for the specific application. The primer alone does not provide adequate
corrosion protection.
Please contact the Service Center for recommendations relating to the paint finish.
1LE7 shaft heights 71 ... 315
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Preparing for use
4.4 Delivery
4.4 Delivery
Checking the delivery for completeness
The drive systems are put together on an individual basis. When you take receipt of the
delivery, please check immediately whether the items delivered are in accordance with the
accompanying documents. Siemens will not accept any claims relating to items missing from
the delivery and which are submitted at a later date.
• Report any apparent transport damage to the delivery agent immediately.
• Report any apparent defects/missing components to the appropriate SIEMENS office
immediately.
Archive the safety and commissioning notes provided in the scope of delivery as well as the
optionally available operating instructions so that these documents are always easily
accessible.
The rating plate optionally enclosed as a loose item with the delivery is provided to enable
the motor data to be attached on or near the motor or installation.
4.5 Transport and storage
4.5.1 Safety instructions for transport
Observe the following when carrying out any work on the motor:
• Comply with the general safety instructions (Page 11).
• Comply with the applicable national and sector-specific regulations.
• When using the motor within the European Union, comply with the specifications laid
down in EN 50110-1 regarding safe operation of electrical equipment.
The information required to correctly attach, lift and transport the motor - such as weight,
center of gravity and attachment points - is provided here:
• Motor dimension drawing and the associated explanations or the technical data
• Transport data
• Rating plate and lifting plate, if available
• Shipping parts list
• Packaging
1LE7 shaft heights 71 ... 315
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Preparing for use
4.5 Transport and storage
Danger when incorrectly lifting and transporting
Danger of death, serious injury, or substantial material damage caused by tipping or falling
transported goods. Comply with the following safety instructions:
• All work must be performed with due caution and care.
• Comply with any notes in the shipping papers.
• Carefully comply with all of the handling information and markings on the packages
whenever transporting and putting the equipment into storage according to ISO 780.
• Only use suitable and adequately dimensioned lifting equipment, transport equipment
and industrial trucks.
Danger due to incorrect attachment and lifting
• Ensure that suitable lifting equipment is available.
• Only hoist the goods using the designated hoisting points and/or at marked positions. The
attachment points are not dimensioned for additional loads.
• Use suitable strap guiding or spreading devices.
• If not specified otherwise in the transport data, always transport the motor in the position
associated with its specific type of construction.
Danger due to damaged attachment points
• Carefully check the attachment points provided on the motor, e.g. attachment eyes, lifting
lugs or ring bolts for possible damage. Replace any damaged attachment points.
• Before using, carefully ensure that the attachment points are correctly attached.
Danger when incorrectly transporting the motor suspended from cables or ropes
If you transport the motor suspended from cables or ropes, the cables or ropes can break, e.g.
as a result of damage. Further, if not adequately attached, the motor can swing. This can
result in death, serious injury, or material damage.
• Use additional, suitable lifting equipment for transport and during installation.
• Two cables alone must be able to carry the complete load.
• Prevent the lifting equipment from sliding by appropriately securing it.
• When using 2-cable lifting equipment, ensure that the maximum angle of inclination is ≤
45° according to ISO 3266 (DIN 580).
• Align the eyebolts so that the cables used for lifting are aligned with the planes of the
eyebolts.
1LE7 shaft heights 71 ... 315
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Preparing for use
WARNING
Note
When lifting the motors for transport, only lift them in a position that
basic construction type.
4.5 Transport and storage
Danger when incorrectly lifting and transporting
The motor can slide or topple over if it is not correctly lifted or transported. This can result in
death, serious injury or material damage.
• Use all the lifting eyes on the motor.
• When using the lifting eyes on the motor, do not attach any additional loads or weight.
The lifting eyes are only designed for the weight of the motor itself.
• Any eyes that are screwed in must be tightly fastened.
• Eyebolts must be screwed in right up to their supporting surface.
• Comply with the permissible eyebolt loads.
• When necessary, use suitably dimensioned lifting equipment, for example hoisting slings
(EN1492-1) and webbing load restraints (EN12195-2).
Danger if the motor falls
The attachment points on the motor are designed for the weight of the motor only. If a
machine set is lifted and transported at a single motor, this can fracture the attachment
point. The motor or machine set may fall. This can result in death, serious injury or material
damage.
• Do not lift machine sets by attaching lifting tackle to the individual motors.
• Use only the equipment provided, e.g. the openings or lugs on the base plates, for
transporting machine sets. Note the maximum capacity of the lifting lug.
• Never remain under or in the immediate vicinity of the motor when it is lifted.
Danger to life as a result of a motor falling
If the lifting gear or load handling attachments were to fail, the motor could fall. This can
result in death, serious injury or material damage.
• In order to gain easy and safe access to the underside of the motor, place it in a
secure and raised position.
corresponds to their
The type of construction of the motor is stated on the rating plate.
1LE7 shaft heights 71 ... 315
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Preparing for use
This way
Fragile
Protect
moisture
Protect
heat
Center of
Hand hooks
Attach
NOTICE
and/or dusty, moist/humid atmospheres.
4.5 Transport and storage
4.5.2 Transport
If any transport locks are in place, remove them before commissioning. Store the transport
locks or disable them. Use the transport locks when transporting the motors again or
reactivate the transport locks.
The motors are packed in different ways depending on how they are transported and their
size. If not otherwise contractually agreed, the packaging corresponds to the packing
guidelines according to ISPM (International Standards for Phytosanitary Measures).
Comply with the graphic symbols provided on the packaging. Their meaning is as follows:
up
4.5.3 Storage
Storing outdoors
Damage to the motor
Damage can occur if incorrectly stored.
Take all precautions to protect the motor under extreme climatic conditions, e.g. salt-laden
Choose a dry storage location which is safe from flooding and free from vibration. Repair any
damage to the packaging before putting the equipment into storage if this is necessary to
ensure proper storage conditions. In order to ensure protection against ground moisture,
locate motors, equipment and crates on pallets, wooden beams or foundations. Prevent
equipment from sinking into the ground. Do not impede air circulation under the stored
items.
goods
against
against
gravity
forbidden
here
Covers or tarpaulins used to protect the equipment against the weather must not come into
contact with the surfaces of the equipment. Use wooden spacer elements to ensure that air
can circulate freely around the equipment.
Storing indoors
The storage rooms must provide protection against extreme weather conditions. They must
be dry, free from dust, frost and vibration and well ventilated.
1LE7 shaft heights 71 ... 315
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Preparing for use
NOTICE
4.5 Transport and storage
Bare metal surfaces
For transport, the bare surfaces (shaft ends, flange surfaces, centering edges) should be
coated with an anti-corrosion agent which will last for a limited amount of time (<6 months).
Apply suitable anti-corrosion measures for longer storage times.
Condensation drain hole
Open any condensation drain holes to drain the condensation depending on the
environmental conditions, every six months at the latest.
Storage temperature
Permissible temperature range: -20 °C to +50 °C
Maximum permissible air humidity: 60%
For motors that have a special design regarding the ambient temperature in the operating
state or the installation altitude, other conditions could apply regarding the storage
temperature. In this case, refer to the motor rating plate for data on the ambient temperature
and installation altitude.
Storage time
Turn the shaft once every year to avoid bearing brinelling. Prolonged storage periods reduce
the useful life of the bearing grease (aging).
Open bearings
• For open bearings, e.g. 1Z, check the status of the grease when stored for longer than 12
months.
• Replace the grease if it is identified that the grease has lost its lubricating properties or is
polluted. The consistency of the grease will change if condensation is allowed to enter.
Closed bearings
• For closed bearings, replace the DE and NDE bearings after a storage time of 48 months.
Storage
The motor can be damaged if you use it or store it unprotected outdoors.
• Protect the motor against intensive solar radiation, rain, snow, ice and dust. Use a
superstructure or additional cover, for example.
• If required, contact the service center, or technically coordinate outdoors use.
1LE7 shaft heights 71 ... 315
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Preparing for use
NOTICE
4.5 Transport and storage
4.5.4 Securing the rotor
Depending on the version, the motor is fitted with a rotor shipping brace. This protects the
bearings against damage due to shock and vibration during transport or storage.
Motor damage due to vibrations
Not using the rotor shipping brace can cause damage to the motor if it is jolted during
transport or storage. Material damage can result.
• If the motor is fitted with a rotor shipping brace, this should always be used when
transporting the motor. The rotor shipping brace must be attached during the transport.
• Protect the motor against strong radial shocks and vibration when storing, as the rotor
shipping brace cannot completely absorb these forces.
• Do not remove the rotor shipping brace until you are ready to push on the output
element.
• If the customer already has mounted parts, such as a coupling or belt pulley, the
bearings can be damaged during transport. In this case, make sure that the customer
uses a rotor shipping brace.
• For motors with a vertical type of construction:
– Do not remove the rotor shipping brace until the motor is in a vertical position.
– If a motor has to be transported in a horizontal position, the rotor must be fixed in
position before the motor is turned onto its side. Vertical motors can be supplied in
the horizontal position from the manufacturing plant.
1LE7 shaft heights 71 ... 315
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Preparing for use
①
Sleeve
②
Shaft screw and washer
Thread in the shaft extension
Tightening torque
M16
40 Nm
M20
80 Nm
M24
150 Nm
M30
230 Nm
Tightening torques for other rotor shipping brace types
Thread in the shaft extension
Preload
M16
13 kN
M20
20 kN
M24
30 kN
M30
40 kN
Axial preload force for other rotor shipping brace types
4.5 Transport and storage
Alternative rotor bracing
• If you transport the motor after the output element has been pulled on, then you must
axially fix the rotor in another way.
Figure 4-1 Axial fastening of the rotor
• The thread in the shaft extension indicates the rotor weight. This indirectly specifies the
required preload force when axially fastening the rotor.
Storing the rotor locking device
Store the rotor locking device in a safe place. It must be remounted if the motor is removed
and shipped on further.
1LE7 shaft heights 71 ... 315
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Preparing for use
4.5 Transport and storage
4.5.5 Commissioning after storage
4.5.5.1 Insulation resistance and polarization index
Measuring the insulation resistance and polarization index (PI) provides information on the
condition of the motor. It is therefore important to check the insulation resistance and the
polarization index at the following times:
• Before starting up a motor for the first time
• After an extended period in storage or downtime
• Within the scope of maintenance work
The following information is provided regarding the state of the winding insulation:
• Is the winding head insulation conductively contaminated?
• Has the winding insulation absorbed moisture?
As such, you can determine whether the motor needs commissioning or any necessary
measures such as cleaning and/or drying the winding:
• Can the motor be put into operation?
• Must the windings be cleaned or dried?
Detailed information on testing and the limit values can be found here:
Checking the insulation resistance (Page 45)
4.5.5.2 Regreasing rolling bearings after storage periods of up to two years
• For motors with regreasing systems, briefly lubricate both bearings after commissioning
with the motor running as a precautionary measure.
• Grease type, grease quantity and relubrication intervals for the regreasing system are
stamped on the rating plate attached to the motor.
4.5.5.3 Releasing the rotor shipping brace before commissioning
If one is being used, release the rotor shipping brace before commissioning.
1LE7 shaft heights 71 ... 315
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Preparing for use
WARNING
WARNING
4.6 Ensure adequate cooling
4.6 Ensure adequate cooling
Overheating and failure of the motor
Death, severe injury or material damage can occur if you do not carefully observe the
following points.
• Do not obstruct ventilation.
• Prevent the air expelled by neighboring equipment from being immediately sucked in
again.
• For vertical types of motor construction with the air intake from above, protect the air
intakes from the ingress of foreign bodies and water.
• If the shaft extension is facing upwards, liquid must be prevented from entering by
moving along the shaft.
Damage caused by small parts falling in
Material damage and injury can occur if the fan is destroyed and therefore the motor
overheats.
• For types of construction with the shaft extension facing downwards, prevent small parts
from falling into the fan cover by providing suitable covers.
• Ensure that the cooling air flow is not reduced as a result of covers and that the
minimum air clearances are maintained.
1LE7 shaft heights 71 ... 315
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Preparing for use
Incorrect
Correct
4.6 Ensure adequate cooling
For motors with separately driven fan, install an interlock circuit that prevents the main
motor being switched on if the separately driven fan is not operational.
Table 4- 1 Air guidance
1LE7 shaft heights 71 ... 315
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Preparing for use
mm
71
15
80 ... 100
20
112
25
132
30
160
40
180 ... 200
90
225 ... 250
100
280 ... 315
110
4.7 Interlock circuit for anti-condensation heating
Table 4- 2 Minimum dimension "x" for the distance between adjacent modules and the air intake of
the motor
Shaft height x
4.7 Interlock circuit for anti-condensation heating
If the anti-condensation heating is operated while the motor is running, this can increase the
temperatures inside the motor.
• Install an interlock circuit that switches off the anti-condensation heating once the main
motor is switched on.
• Only switch on the anti-condensation heating after the motor has been switched off.
Comply with the data stamped on the plate of the anti-condensation heating, if available.
4.8 Noise emission
Prevention of hearing damage
If the permissible sound pressure level is exceeded, hearing damage can occur when
operating three-phase motors at their rated power. The permissible sound pressure level is
70 dB (A).
1LE7 shaft heights 71 ... 315
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Preparing for use
4.9 Voltage and frequency fluctuations during line operation
4.9 Voltage and frequency fluctuations during line operation
Unless otherwise stated on the rating plate, the permissible voltage/frequency fluctuation is
corresponds to Zone B in IEC / EN 60034-1. Permissible fluctuations that go beyond this are
indicated on the rating plate – or for some versions, on a supplementary plate.
Operate the motor in continuous operation in Zone A. Prolonged operation in Zone B is not
recommended:
• Exceeding the permissible tolerances for voltage and frequency can lead to an
impermissibly high temperature rise of the winding. This can result in long-term damage
to the winding.
• Limit exceptions of this sort with regard to the values that arise, how often, and for how
long they occur.
• Where possible and within a reasonable time take corrective actions such as reducing the
power. In this way you can avoid that the service life of the motor is reduced as a result of
thermal aging.
4.10 Rotational speed limit values
Danger as a result of resonance within certain speed ranges
At over-critical speeds, motors encounter resonance within certain speed ranges. Such
vibrations can reach impermissibly high levels. This can result in death, serious injury or
material damage.
• The controller must ensure that those speed ranges are blocked when the converter is in
operation. Please note the data on the blocked speed ranges specified in the Electrical
Data.
• The blocked speed ranges must be run through rapidly.
Motor damage due to excessively high speeds
Excessive rotational speed can lead to serious damage to the motor. This can result in death,
serious injury or material damage.
• Avoid operation above the permissible speed by using the appropriate control function.
• Observe the speeds stamped on the rating plate and in the Electrical Data.
4.11 System-inherent frequencies
Excessively high vibration levels and system resonances can damage the machine set.
• Configure and match the system consisting of the foundation and machine set in such a
way that no system resonances can arise and result in the permissible vibration levels
being exceeded.
• The vibration values according to DIN ISO 10816-3 must not be exceeded.
1LE7 shaft heights 71 ... 315
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Note
If the torque levels are very unequal (e.g. when a reciprocating compressor is being driven), a
non
effect on the supply system and cause impermissible interference emissions as a result.
Note
Converter
•
•
•
•
s to conductively connect a shielded motor supply
•
4.12 Electromagnetic compatibility
4.12 Electromagnetic compatibility
-sinusoidal motor current will be induced whose harmonics can have an impermissible
If operated with a frequency converter, the emitted interference varies in strength,
depending on the design of the converter (type, interference suppression measures,
manufacturer).
Avoid that the specified limit values stipulated for the drive system (consisting of the
motor and converter) are exceeded.
You must observe the EMC information from the manufacturer of the converter.
The most effective method of shielding i
cable to the metal terminal box of the motor (with a metal screw connection) over a large
surface area.
On motors with integrated sensors (e.g. PTC thermistors), disturbance voltages caused by
the converter may occur on the sensor cable.
When used in accordance with their intended purpose, and operated on a line supply with
characteristics according to EN 50160, the enclosed motors comply with the requirements of
the EC Directive regarding electromagnetic compatibility.
Immunity to interference
The motors fulfill the requirements of interference immunity in conformity with EN /
IEC 61000-6-2. For motors with integrated sensors, e.g. PTC thermistors, the operating
company must ensure sufficient interference immunity by selecting a suitable sensor signal
cable (possibly with shielding, connected in the same way as the motor feeder cable) and a
suitable evaluation unit.
When operating the motors from a converter at speeds higher than the rated speed, carefully
comply with the mechanical speed limits (safe operating speed EN / IEC 60034-1).
1LE7 shaft heights 71 ... 315
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4.13 Converter operation
NOTICE
4.13.1 Parameterizing the converter
• If the design of the motor requires connection to a particular converter type, the rating
plate will contain corresponding additional information.
• Correctly parameterize the converter. Parameterizing data can be taken from the motor
rating plates.
You can find parameter data here:
– In the operating instructions for the converter.
– In the SIZER engineering tool
– In the SINAMICS Configuration Manuals.
• Do not exceed the specified maximum speed limit nmax.
• Set the skip frequency band between 38 Hz and 48 Hz (both inclusive) for SH 315
two-pole 1LE7 motors when operating on VFD.
Preparing for use
4.13 Converter operation
• Check that the motor is cooled sufficiently for commissioning purposes.
4.13.2 Converter input voltage
The insulation system of SIMOTICS motors always complies with the requirements of stress
category B (IVIC B = high stress). If voltage peaks higher than those specified according to
IVIC B can occur, contact the Service Center.
• For a line supply voltage (converter input voltage) up to max. 480 V, and when controlled
from a SINAMICS G/SINAMICS S converter with uncontrolled/controlled infeed: Comply
with the guidelines for configuring motor and converter.
• Operation with a converter from another manufacturer: Comply with the permissible
voltage peaks according to IEC 60034-18-41 in accordance with stress category B,
dependent on the particular line voltage (converter input voltage) and the motor
insulation system.
Material damage caused by an excessively high supply voltage
The insulation system will be damaged if the supply voltage is too high for the insulation
system. This can completely destroy the motor.
• Comply with the peak voltages as laid down in the guidelines above.
1LE7 shaft heights 71 ... 315
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Page 42
Preparing for use
Concentric copper or aluminum shield
Steel armor
4.13 Converter operation
4.13.3 Reducing bearing currents during operation with converter (low voltage)
Taking the following actions will reduce the bearing currents:
• Ensure that the contacts are made over a large area. Solid copper cables are not suitable
for high-frequency grounding because of the skin effect.
Equipotential bonding conductors:
Use equipotential bonding conductors:
• between motor and driven machine
• between motor and converter
• between the terminal box and the RF grounding point at the motor enclosure.
Selecting and connecting the cable:
As far as possible, use symmetrically arranged, shielded connection cables. The cable
shielding, made up of as many strands as possible, must have good electrical conductivity.
Braided shields made of copper or aluminum are very suitable.
• The shield is connected at both ends, at the motor and converter.
• To ensure good discharging of high-frequency currents, provide contacting over a large
surface area:
– as contact established through 360° at the converter
– at the motor, for instance with EMC glands at the cable entries.
• If the cable shield is connected as described, then it ensures the specified equipotential
bonding between the motor enclosure and converter. A separate RF equipotential
bonding conductor is then not necessary.
• If the cable shield is not connected due to special secondary conditions, or not adequately
connected, then the specified equipotential bonding is not provided. In this particular
case, use a separate RF equipotential bonding conductor:
– Between the motor enclosure and protective ground rail of the converter.
– Between motor enclosure and driven machine
– Use braided flat copper straps or high-frequency cables with finely-stranded
conductors for the separate RF equipotential bonding cable.
– Ensure that the contacts are made over a large area.
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Page 43
Preparing for use
NOTICE
Note
Insulated bearing at NDE is a generally recommended practice. Refer to IEC TS 60034
plan effective countermeasures for reducing bearing currents.
①
Driven machine
④
Insulated bearings
②
Motor
⑤
Insulated tachometer fitting
③
Coupling
4.13 Converter operation
Measures to reduce bearing currents
To specifically reduce bearing currents, you must consider the system as a whole, which
comprises the motor, converter, and driven machine. The following measures support you
when reducing bearing currents and help to avoid damage:
• In the overall system, set up a properly meshed grounding system with low impedance.
• Use the common-mode filter (damping cores) at the converter output.
• Limit the rise in voltage by using output filters. Output filters dampen the harmonic
content in the output voltage.
• The operating instructions for the converter are not part of this documentation. Refer to
the configuration information for the converter.
Motor within itself does not induce shaft circulating current to cause bearing failure. Any
bearing failure with fluting marks is not to be attributed to motor as a cause. Care must
be taken while operating motor with converter to ensure the strict adherence to EMC
guidelines by considering motor as a part of a complete system (motor + drive +
cabling).
4.13.4 Insulated bearings for converter operation
If the motor is controlled from a low-voltage converter, depending on the motor type, an
insulated bearing can be fitted at the NDE.
An insulated speed encoder can be optionally mounted.
Comply with the information provided on the motor plates relating to bearing insulation and
possible jumpers.
-25 to
Figure 4-2 Schematic representation of a single drive
1LE7 shaft heights 71 ... 315
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Preparing for use
NOTICE
①
Driven machine
④
Insulated bearings
②
Motor
⑤
Insulated tachometer fitting
③
Coupling
⑥
Insulated coupling
NOTICE
4.13 Converter operation
Bearing damage
The bearing insulation must not be bridged. Bearing currents can damage bearings.
• Do not bridge the bearing insulation for subsequent installation work, such as the
installation of an automatic lubrication system or a non-insulated vibration sensor.
• Where necessary, contact the Service Center.
If you connect two motors in series in "tandem operation", install an insulated coupling
between the motors.
Figure 4-3 Schematic representation of a tandem drive
Bearing damage
Bearing currents can flow if the coupling between the motors of the tandem drive is not
insulated. This can damage the DE bearings of both motors.
• Use an insulated coupling to couple the motors.
• As an alternative for machine operation with low-voltage converter, insulated bearing at
DE can be fitted depending on motor type, but a non-conductive coupling is
recommended.
4.13.5 Tandem operation
If you connect two motors in series in "tandem operation", locate a coupling between the
motors; this coupling should satisfy the Directive 2014/34/EU or the regulations that apply in
the country where the equipment is installed.
1LE7 shaft heights 71 ... 315
42 Operating Instructions, 04/2022, A5E51689275A-AA
Page 45
5
Installation
Observe the following when carrying out any work on the motor:
• Comply with the general safety instructions (Page 11).
• Comply with the applicable national and sector-specific regulations.
• When using the motor within the European Union, comply with the specifications laid
down in EN 50110-1 regarding safe operation of electrical equipment.
5.1 Safety instructions for installation
Injury and material damage caused by inappropriate fastening material
If screws of an incorrect property class have been selected or if they have been fastened to an
incorrect tightening torque, they may break or become loose. This will cause the motor to
move, which could damage the bearings. The rotor could smash into the motor enclosure
and motor parts could be flung out of place. This can result in death, serious injury or
material damage.
• Comply with the required property classes for screwed connections.
• Tighten the screwed connections to the specified tightening torques.
Injury and material damage caused by incorrect motor alignment
If the motor has not been properly aligned, this will mean the fastening parts are subjected to
stress/distortion. Screws may become loose or break, the motor will move, motor parts could
be flung out of place. This can result in death, serious injury or material damage.
• Carefully align the motor to the driven machine.
Material damage caused by improper handling
Mounting parts such as temperature sensors or speed sensors are attached to the motor and
could be ripped off or destroyed as a result of improper handling. This could lead to motor
malfunctions, extending even to total loss of the motor.
• Where necessary, use suitable steps when performing installation work on the motor.
• Do not stand on cables or attachments during installation. Do not use attachments as
steps.
Loss of conformity with European directives
In the delivery state, the motor corresponds to the requirements of the European directives.
Unauthorized changes or modifications to the motor lead to the loss of conformity with
European Directives and the loss of the associated warranty.
1LE7 shaft heights 71 ... 315
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Installation
Note
Note also the technical data on the rating plates on the motor enclosure.
NOTICE
load.
5.2 Preparing for installation
5.2 Preparing for installation
5.2.1 Requirements for installation
The following requirements must be satisfied prior to starting installation work:
• Staff have access to the operating and installation instructions.
• The motor is unpacked and ready for mounting at the installation location.
• Measure the insulation resistance of the winding before starting any installation work. If
the insulation resistance lies below the specified value, take appropriate remedial
measures. These remedial measures may necessitate the motor being removed again and
transported.
Damage to the motor
To avoid material damage, before commissioning, check whether the correct direction of
rotation of the motor has been set on the customer side, e.g. by decoupling from the driven
Damage to mounted parts and components as a result of high temperatures
The motor components get very hot during operation. High temperatures can damage parts
mounted by customers, such as cables manufactured out of materials that are not heat
resistant.
• Temperature-sensitive parts must not come into contact with or be attached to
components mounted on the motor.
• Only use heat-resistant mounting parts. The connecting cables and cable entries must be
suitable for the particular application.
1LE7 shaft heights 71 ... 315
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Page 47
Installation
WARNING
– Attach the connection cable.
5.2 Preparing for installation
5.2.2 Insulation resistance
5.2.2.1 Insulation resistance and polarization index
Measuring the insulation resistance and polarization index (PI) provides information on the
condition of the motor. It is therefore important to check the insulation resistance and the
polarization index at the following times:
• Before starting up a motor for the first time
• After an extended period in storage or downtime
• Within the scope of maintenance work
The following information is provided regarding the state of the winding insulation:
• Is the winding head insulation conductively contaminated?
• Has the winding insulation absorbed moisture?
As such, you can determine whether the motor needs commissioning or any necessary
measures such as cleaning and/or drying the winding:
• Can the motor be put into operation?
• Must the windings be cleaned or dried?
Detailed information on testing and the limit values can be found here:
Checking the insulation resistance (Page 45)
5.2.2.2 Checking the insulation resistance
Hazardous voltage at the terminals
During and immediately after measurement of the stator winding insulation resistance,
hazardous voltages can be present at the terminals. Contact with these can result in death,
serious injury or material damage.
• If any power cables are connected, check to make sure line supply voltage cannot be
delivered.
• Discharge the winding after measurement until the risk is eliminated, e.g. using the
following measures:
– Connect the terminals with the ground potential until the recharge voltage drops to a
non-hazardous level
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Installation
(1)
RC = KT · RT
RC
Insulation resistance converted to 50 °C reference temperature
kT
Temperature coefficient according to equation (2)
RT
Measured insulation resistance for measuring/winding temperature T in °C
(2)
KT = (0.5)
50
Reference temperature in °C
10
Halving/doubling of the insulation resistance with 10 K
T
Measuring/winding temperature in °C
5.2 Preparing for installation
Measure the insulation resistance
1. Before you begin measuring the insulation resistance, read the operating manual for the
insulation resistance meter you are going to use.
2. Make sure that no power cables are connected.
3. Measure the winding temperature and the insulation resistance of the winding in relation to
the motor enclosure. The winding temperature should not exceed 50 °C during the
measurement. Convert the measured insulation resistances in accordance with the formula
to the reference temperature of 50 °C. This thereby ensures that the minimum values
specified can be compared.
4. Read out the insulation resistance one minute after applying the measuring voltage.
Conversion to the reference temperature
When measuring with winding temperatures other than 50 °C, convert the measuring value
to the reference temperature of 50 °C according to the following equations from IEEE 43-
2000.
(50-T)/10
In this case, doubling or halving the insulation resistance at a temperature change of 10 K is
used as the basis.
• The insulation resistance halves every time the temperature rises by 10 K.
• The resistance doubles every time the temperature falls by 10 K.
For a winding temperature of approx. 25° C, the minimum insulation resistances are 30 MΩ
(U ≤ 1000 V) or 300 MΩ (U > 1000 V). The values apply for the complete winding to ground.
Twice the minimum values apply to the measurement of individual assemblies.
• Dry, new windings have an insulation resistance of between 100 and 2000 MΩ, or
possibly even higher values. An insulation resistance value close to the minimum value
could be due to moisture and/or dirt accumulation. The size of the winding, the rated
voltage and other characteristics affect the insulation resistance and may need to be taken
into account when determining measures.
• Over its operating lifetime, the motor winding insulation resistance can drop due to
ambient and operational influences. Calculate the critical insulation resistance value
depending on the rated voltage by multiplying the rated voltage (kV) by the specific
critical resistance value. Convert the value for the current winding temperature at the time
of measurement, see above table.
Limit values of the anti-condensation heating insulation resistance
It is not permissible that the insulation resistance of the anti-condensation heating with
respect to the motor enclosure falls below 1 MΩ when measured at 500 V DC.
1LE7 shaft heights 71 ... 315
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Installation
5.2 Preparing for installation
5.2.3 Preparing the assembly area
1. Prepare a suitable assembly area (e.g. assembly stands). Make sure that the assembly area
has sufficient clearance from the floor for the DE shaft end. The necessary data is provided
in the motor dimension drawing.
2. Refer to the shipping documents to check that all motor components are available for
assembly.
5.2.4 Lift the motor to where it will be mounted and position it
• For vertical installation, use all the eyebolts provided and when necessary, hoisting straps
according to DIN EN 1492-1 and/or lashing straps according to DIN EN 12195-2 to stabilize
the position.
• Prevent foreign bodies from falling into the fan cover. For vertical motor installation with
the shaft end facing downwards, attach a protective canopy.
• If the shaft extension is facing upwards, the user must prevent liquid from moving along
the shaft and entering the motor.
• Clean bare metal surfaces with anti-corrosion agent using white spirit to ensure proper
installation and / or motor mounting.
• Do not obstruct the ventilation. Do not draw in the hot discharged air directly – also from
adjacent equipment.
• Avoid exposing them to direct, intense solar radiation, rain, snow, ice, or also dust for
extended periods. Attach a covering structure or an additional cover when using or storing
outdoors.
• Do not exceed the permissible axial and radial forces.
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Installation
NOTICE
Note
Only authorized
at the motor enclosure.
5.2 Preparing for installation
5.2.5 Motors with type of construction IM B15, IM B9, IM V8 and IM V9
Types of construction without bearings on the drive side
These motors do not have their own bearing system for the motor shaft at the drive end (DE).
The motor shaft is accepted by the (hollow) shaft or coupling of the system or driven
machine.
• Using the centering edge, the motor is aligned with respect to enclosures, flanges or
driven machines.
• Note that the temperature of the motor and motor shaft increases during operation. The
thermal expansion of the motor shaft must be compensated by the customer by applying
suitable measures.
Use the spring washers provided to locate the NDE bearing without any play.
Damage to the motor
Material damage can occur if the following notes are not carefully observed:
• The IM B3 bearing shield with integrated distance ring mounted at the drive end (DE) is
only used transport lock. A warning label is attached to this bearing shield.
• The spacer ring is not a roller bearing.
• Remove the bearing shield and the spacer ring.
• Remove the transport lock before commissioning.
5.2.6 Foot mounting
1LE7 shaft heights 71 ... 315
48 Operating Instructions, 04/2022, A5E51689275A-AA
retrofit partners must be employed to relocate the bolted on mounting feet
After attaching the mounting feet, you must note the following in order to avoid stressing
and deforming the motor.
• Ensure that the foot mounting surfaces are aligned in one plane and are parallel to the
motor shaft.
• Post-machine the foot mounting surfaces or use thin shims, for example.
• Professionally touch up damaged painted surfaces.
• Observe the information provided in Chapter "Aligning and fixing the motor (Page 49)".
Page 51
Installation
5.3 Aligning and fixing the motor
5.3 Aligning and fixing the motor
Observe the following when aligning and mounting:
• Ensure a flat and uniform contact surface for foot and flange mounting.
• When mounting on the wall, support the motor from below, e.g. using a bracket, or bolt
it.
• Precisely align the motor when couplings are used.
• Ensure that the mounting surfaces are clean and free of any dirt.
• Remove any anti-corrosion protection using white spirit.
• Avoid installation-related resonances with the rotating frequency and twice the line
frequency.
• Note any unusual noise when the rotor is manually turned.
• Check the direction of rotation with the motor uncoupled.
• Avoid rigid couplings.
• Repair any damage to the paint, this must be done immediately and correctly.
5.3.1 Measures for alignment and mounting
The following measures are required in order to compensate any radial offset at the coupling
and to horizontally adjust the motor with respect to the driven load:
• Vertical positioning
For vertical mounting positions, avoid deforming the motors by placing shims under the
mounting feet. Keep the number of shims low; only use a few stacked shims.
• Horizontal positioning
To position the motor horizontally, shift it sideways on the foundation and ensure that the
axial position is maintained (angularity error).
• When positioning the motor, ensure that a uniform axial gap is maintained around the
coupling.
• Smooth running
Preconditions for smooth, vibration-free operation:
– Stable foundation design free of any shock or vibration.
– A precisely aligned coupling.
– A well-balanced drive output element (coupling, belt pulleys, fans, ...)
Maintain the maximum permissible vibration values in operation according to
ISO 10816-3.
Avoid inadmissible vibration caused by imbalance, for example (drive output element),
external vibration or any resonance over the complete speed range.
It may be necessary to completely balance the motor with the drive output element or the
system resonance frequency must be shifted.
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Installation
[mm]
≤ 132
0.10
160
0.15
≥ 180
0.20
5.3 Aligning and fixing the motor
• Foot mounting/flange mounting
– Use the specified thread size laid down in EN 50347 / IS 1231 / IS 2223 when flanging
the motor to a foundation or a motor flange.
– Mount the motor at all the foot or flanged holes provided. The choice of fixing
elements depends on the foundation and is the plant operator's responsibility. Comply
with the required property classes for screwed connections and materials for fixing
elements.
– Select the correct screw length for IM B14 flanges.
– Ensure that the screw heads are in full contact with the flange surface. Use additional
flat washers (ISO 7093), especially for elongated foot mounting holes.
5.3.2 Flatness of the supporting surfaces for conventional motors
Shaft height Flatness
5.3.3 Motor frame mounting feet (special design)
Please note that when the terminal box is mounted at the NDE (option H08), dimension C can
deviate from EN 50347 / IS 1231 / IS 2223.
To comply with dimension C according to EN 50347 / IS 1231 / IS 2223 for motors with
double or triple holes at the NDE, use the appropriate screw bore.
1LE7 shaft heights 71 ... 315
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Installation
5.4 Installing the motor
5.4 Installing the motor
5.4.1 Preconditions for smooth, vibration-free operation
Preconditions for smooth, vibration-free operation:
• Stable foundation design
• Precise alignment of the motor
• Correct balancing of parts to be fitted to the shaft end.
• Vibration values in compliance with ISO 10816-3
5.4.2 Aligning the motor to the driven machine and mounting
5.4.2.1 Selecting bolts
• Unless specified otherwise, use fixing screws with at least strength class 8.8 to ISO 898-1
to ensure that the motor is securely mounted and to transmit the torque-generated
forces.
• When selecting the bolts and the design of the foundation, take into account the
maximum forces occurring in the case of a fault such as short circuit or system transfers in
phase opposition, etc.
Request the foundation force values from the Service Center if required.
5.4.2.2 Horizontal types of construction with mounting feet
1. Refer to any instructions for aligning the driven machine and those of the coupling
manufacturer.
2. Align the motors with coupling output to the driven machine in such a manner that the
center lines of the shafts are parallel with no offset. This ensures that no additional forces
affect their bearings during operation.
3. For the vertical positioning (x→0) place thin shims under the motor feet. The number of
shims should be kept as low as possible, i.e. stack as few as possible. This also prevents the
motor being subjected to any stress/distortion. If available, use the existing tapped holes for
the forcing-off bolts to somewhat raise the motor.
4. When positioning the motor, ensure that a uniform axial gap (y→0) is maintained around
the coupling.
5. Fix the motor to the foundation. The choice of fixing elements depends on the foundation
and is the plant operator's responsibility.
1LE7 shaft heights 71 ... 315
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Installation
Note
Motor expansion
Whe
temperature increases.
5.4 Installing the motor
n aligning, make allowance for the thermal expansion of the motor when the
5.4.2.3 Horizontal types of construction with flange
The standard flange is provided with a centering. The choice of fit for the mating flange on
the driven machine is the system manufacturer's or the plant operator's responsibility.
If the motor is not fitted with a standard flange, align the motor to suit the driven machine.
Procedure
The motor axis must be horizontal when it is lifted and the flange must be parallel to the
mating flange, so as to avoid seizing and stressing. Otherwise damage to the centering will
result.
1. Grease the centering flange with assembly paste to make the process easier.
2. Screw three studs into tapped holes spaced about 120° apart around the driven machine
flange. The studs act as positioning aids.
3. Position the motor so that its axis is aligned with that of the driven machine, but not yet
quite touching. Advance the motor slowly towards the driven machine; advancing too
quickly risks damaging the centering.
4. If necessary, rotate the motor into the right position so that the clearance holes in the flange
are central to the tapped holes.
5. Move the motor fully up against the mating flange so that it is fully in contact.
6. Fix the motor using the flange fixing bolts, finishing by replacing the studs.
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Installation
rpm
mm
mm per 100 mm coupling diameter
750
0.09
0.09
1500
0.06
0.05
3000
0.03
0.025
5.4 Installing the motor
5.4.2.4 Vertical types of construction with flange
The standard flange is provided with a centering. The choice of fit for the mating flange on
the driven machine is the system manufacturer's or the plant operator's responsibility.
If the motor is not fitted with a standard flange, align the motor to suit the driven machine.
Procedure
The motor axis must be vertical when it is lifted and the flange must be parallel to the mating
flange, so as to avoid seizing and stressing. Otherwise damage to the centering will result.
1. Grease the centering flange with assembly paste to make the process easier.
2. Screw in two studs into tapped holes on opposite sides of the driven machine flange. The
studs act as positioning aids.
3. Lower the motor slowly toward the driven machine and into the centering, so that the
flanges do not quite touch. Lowering too quickly risks damaging the centering.
4. If necessary, rotate the motor into the right position so that the clearance holes in the flange
are central to the tapped holes.
5. Lower the motor completely onto the mating flange so that it is fully in contact; then
remove the studs.
6. Fix the motor using the flange fixing bolts.
5.4.3 Removing the rotor shipping brace
If a rotor shipping brace is attached to the motor, remove it at the last possible moment,
for example, when you are ready to push on the output or drive element.
Storing the rotor locking device
Store the rotor locking device in a safe place. It must be remounted if the motor is removed
and shipped on further.
5.4.4 Recommended alignment accuracy
The alignment accuracy required depends essentially on the configuration of the overall
machine train. Observe the required alignment accuracy of the coupling manufacturer in all
cases when aligning the motor.
Table 5- 1 Recommended alignment accuracy
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Speed
Parallel offset
Angular offset
53
Page 56
Installation
WARNING
5.4 Installing the motor
5.4.5 Mounting the drive output elements
The rotor is dynamically balanced. For shaft extensions with feather keys, the type of
balancing is specified using the following coding on the face of the drive end of the shaft
extension and on the rating plate:
• "H" means balancing with a half feather key (standard)
• "F" means balancing with a whole feather key
• "N" means balancing without a feather key.
Figure 5-1 DE balancing type
Risk of injury due to Incorrect installation or removal
The feather key may be flung out if the motor is operated without drive output elements,
such as coupling, etc. Carefully comply with the required measures.
This can result in death, serious injury or material damage.
• The general touch protection measures for drive output elements must be observed.
• Only operate the motor with the drive output element mounted.
• Drive output elements may only be pulled on or pulled off with the correct equipment.
• The feather keys are only locked against falling out during shipping. For test operation or
when commissioning without drive output element, carefully secure the feather key
using a suitable locking element. When doing this, take into account the type of motor
balancing.
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Installation
Withdrawing drive output elements
Mounting drive output elements
5.4 Installing the motor
Pulling on drive output elements
• Requirements:
– The coupling and/or the drive output element must be appropriately dimensioned for
the operating case at hand.
– Observe the coupling manufacturer's instructions.
– Make sure that the balancing type of the drive output element correctly matches the
type of balance of the rotor.
– Use only ready drilled and balanced drive output elements. Check the hole diameters
and the balancing status before pulling them on. Thoroughly clean the shaft extension.
• Pulling on:
– Heat up the drive output elements to expand them before pulling them on. Select the
temperature difference for the heating process to suit the coupling diameter, fit and
material. Observe the coupling manufacturer's instructions.
– Drive output elements may only be pulled on or pulled off with the correct equipment.
The drive output element must be pulled on in one continuous operation via the front
thread holes in the shaft or pushed on by hand.
– Do not use a hammer, as this will damage the bearings.
Only transfer radial or axial forces specified in the catalog to the motor bearings via the shaft
extension.
You can obtain the permissible values for axial and radial forces by contacting the Service
Center or by referring to the motor catalog.
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Installation
5.4 Installing the motor
Shaft extensions with feather key
The feather key data for the shaft and drive output element must match and indicate the
correct type of balancing. The drive output element must be correctly mounted.
The balance quality corresponds to vibration severity grade "A" for the complete motor;
vibration severity grade "B" is possible as an option. To ensure the required balance quality, it
must be ensured that the feather key data on the hub and motor shaft match in the case of a
shorter or longer drive output element.
• If the drive output element is shorter than the feather key with balancing type "H", then
you must machine off the section of feather key protruding from the shaft contour and
drive output element in order to maintain the balance quality.
• If the drive output element is longer than the feather key, when balancing the coupling,
take into account that the feather key does not take up all of the coupling slot.
The following applies to all four-pole motors with a frequency ≥ 60 Hz:
• The feather key must be shortened if the coupling hub is shorter than the feather key.
• The center of gravity of the coupling half should be within the length of the shaft end.
• The coupling used must be prepared for system balancing.
Align the offset at the coupling between motors and the driven machines so that the
maximum permissible vibration values according to ISO 10816-3 are not exceeded.
1LE7 shaft heights 71 ... 315
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Page 59
6
Electrical connection
Observe the following when carrying out any work on the motor:
• Comply with the general safety instructions (Page 11).
• Comply with the applicable national and sector-specific regulations.
• When using the motor within the European Union, comply with the specifications laid
down in EN 50110-1 regarding safe operation of electrical equipment.
6.1 Basic rules
The following generally applies to electrical connections:
• Ensure that there is a safe and reliable PE ground connection before starting any work.
• The connecting cables can be sealed and secured at every cable entry point into the
terminal box.
• Lay the connecting cables and in particular the PE conductor in the terminal box in an
open arrangement so that chafing of the cable insulation is prevented.
• Connect the motor in such a way that a permanent, safe electrical connection is
maintained. Avoid protruding wire ends.
• Lay and secure external auxiliary cables separately from the main cable. Elements with
cable ties may be present for this purpose.
• In case of high humidity or when installed outside, water drops can move along the cable
jacket and enter the motor through the cable entry and cable gland.
If you route the cable with an appropriate loop then water doesn't enter the terminal box,
but simply drips off.
Figure 6-1 Water drip loop
1LE7 shaft heights 71 ... 315
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Electrical connection
Note
Service Center
If you require support when electrically connecting up the motor, please contact the Service
Center (Page 117).
6.2 Safety instructions for the electrical connection
6.2 Safety instructions for the electrical connection
Hazardous voltages on electrical connections
Dangerous voltages can arise on electric motors. Death, injury or material damage can occur.
Observe the following safety information before connecting up the motor:
• Only qualified personnel should carry out work.
• Carefully follow the "5 safety rules (Page 11)".
• Disconnect the motor from the power supply and take measures to prevent it being
reconnected. This also applies to auxiliary circuits.
• Check that the motor really is in a no-voltage condition.
• Ensure that there is a safe and reliable protective conductor connection before starting
any work.
• If the incoming power supply system displays any deviations from the rated values in
terms of voltage, frequency, curve form or symmetry, such deviations will increase the
temperature and influence electromagnetic compatibility.
• Operating the motor on a line supply system with a non-grounded neutral point is only
permitted over short time intervals that occur rarely, e.g. the time leading to a fault being
eliminated (ground fault of a cable, IEC/EN 60034-1).
Material damage as a result of connection parts coming loose
If you use fixing elements made from the wrong material or apply the wrong tightening
torque, this could impair current transfer or cause connecting parts to become loose. This
could result in material damage to the motor or even in total failure, which could in turn lead
indirectly to material damage to the system.
• Tighten the screwed connections to the specified tightening torques.
• Observe any specifications regarding the materials from which fixing elements must be
made.
• When performing servicing, check the fastenings.
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6.3 Connecting the motor
6.3 Connecting the motor
Take the following criteria into account when selecting the connecting cables:
• Rated current
• Rated voltage
• If required, service factor
• System-dependent conditions, such as ambient temperature, routing type, cable cross-
section as defined by required length of cable, etc.
• Configuration notes
• Requirements according to IEC/EN 60204-1
• Dimensioning for bundled cable routing, e.g. according to DIN VDE 0298 Part 4 or
IEC 60364-5-52
• Carefully comply with the information provided in EN / IEC 60034-1 (VDE 0530-1)
regarding operation at the limits of A and B zones, especially in respect of temperature
increase and deviation of the operating data from the rated data stamped on the rating
plate. Do not exceed these limits. Do not use motors in zone B that are marked for zone A.
• Connect up so that a permanently safe electrical connection is guaranteed (no protruding
wire ends); use the assigned cable-end fittings (e.g. cable lugs, end sleeves).
Connect up the line supply voltage and arranged the disconnecting link in accordance
with the circuit diagram provided in the terminal box.
• Select the connecting cables in accordance with DIN VDE 0100 taking into account the
rated current and the installation-specific conditions – e.g. ambient temperature, routing
method etc. - according to DIN VDE 0298 and/or EN / IEC 60204-1.
The technical specifications stipulate the following that have to be taken into account with
respect to the motor connection:
• Direction of rotation
• The number and arrangement of the terminal boxes.
• The circuit and connection of the motor winding
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Electrical connection
DANGER
box.
NOTICE
Direction of rotation
According to IEC
According to NEMA
Line feeder cables
-
L1 L2 L3
L1 L2 L3
Terminal connection
Clockwise rotation
U V W
T1 T2 T3
Terminal connection
Counter-clockwise rotation
V U W
T2 T1 T3
Direction of rotation of the motor when viewing the DE
6.3 Connecting the motor
6.3.1 Terminal box
Hazardous voltage
Electric motors have high voltages. When incorrectly handled, this can result in death or
severe injury.
Switch off the motor so that it is in a no-voltage condition before you open the terminal
Damage to the terminal box
If you incorrectly carry out work on or in the terminal box, this can result in material
damage. You must observe the following to avoid damaging the terminal box:
• Ensure that the components inside the terminal box are not damaged.
• It must be ensured that there are no foreign bodies, dirt or moisture in the terminal box.
• Close the terminal box using the original seal so that it is dust tight and water tight.
• Use O-rings or suitable flat gaskets to seal entries in the terminal box (DIN 42925) and
other open entries.
• Please observe the tightening torques for cable entries and other screws.
6.3.1.1 Circuit diagram inside the terminal box cover
Data on the connection and connecting the motor winding can be found in the circuit
diagram in the cover of the terminal box.
6.3.1.2 Direction of rotation
The standard motors are suitable for clockwise and counter-clockwise rotation.
For defined directions of rotation (direction of rotation arrow), appropriately connect the line
power cables.
• If you connect the line cables with phase sequence L1, L2, L3 at U, V, W or according to
NEMA at T1 T2 T3 , then the motor rotates in the clockwise direction.
• If you interchange 2 connections, e.g. L1, L2, L3 at V, U, W or according to NEMA at
T2 T1 T3, then the motor rotates counterclockwise.
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Electrical connection
1 U 1 - 1
Marking
x
Code for split winding, where applicable. Special case for pole assignment for
A lower index signifies a lower speed.
x
Phase designation U, V, W
x
Index for winding start (1) or end (2) or if there is more than one connection per
winding
x
Additional indices for cases in which it is obligatory to connect parallel power
feed cables to several terminals with otherwise identical markings
Note
The screw
(diameter armoring, braid, shield).
For the screw
protection (water and dust)
rating plate.
WARNING
6.3 Connecting the motor
6.3.1.3 Terminal marking
According to IEC / EN 60034-8, the following basic definitions apply to the terminal markings
for 3-phase motors:
Table 6- 1 Terminal markings using the 1U1-1 as an example
pole-changing motors.
6.3.1.4 Cable entry
Assembly and laying cables
Screw the screw-type connection (cable gland) into the cable entry or fasten with a nut.
-type connections must have been matched to the connecting cables used
-type connections, comply or exceed the requirements relating to IP degree of
- as well as the temperature range in operation stamped on the
6.3.1.5 Versions
The terminal box can be turned 4 x 90 degrees on the terminal base of the motor's housing.
6.3.1.6 Protruding connection cables
Risk of short-circuit and voltage hazard
A short circuit can occur if connecting cables are clamped and crushed between parts of the
enclosure and the cover plate.
This can result in death, severe injury and material damage.
• During disassembly and particularly when installing the cover plate, make sure that the
connecting cables are not clamped between enclosure parts and the cover plate.
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Electrical connection
CAUTION
Rms value of the alternating voltage U
Minimum air clearance
mm
≤ 250 V
3.0
≤ 500 V
3.0
≤ 630 V
5.5
≤ 1000 V
8.0
Values apply at an
When determining the required minimum air clearance, the voltage value in the table may be in-
creased by a factor of 1.1, so that the rated input voltage range is taken into account during general
use.
6.3 Connecting the motor
Damage to connecting cables that are freely led out
You must observe the following note to avoid damaging connecting cables that are freely
led out:
• It must be ensured that there are no foreign bodies, dirt, or moisture in the terminal base
of the motor enclosure.
• Use O-rings or suitable flat gaskets to seal entries in cover plates (DIN 42925) and other
open entries.
• Seal the terminal base of the motor enclosure using the original seal of the cover plate to
prevent dust and water from entering.
• Please observe the tightening torques for cable entries and other screws.
6.3.1.7 Connecting protruding cables
In the case of connection cables brought out of the motor, no terminal board is installed on
the terminal base of the motor housing. The connection cables are directly connected to
stator winding terminals at the factory.
The connection cables are color-coded or labeled. The customer directly connects individual
cables in the control cabinet for their system in accordance with the labeling.
6.3.1.8 Minimum air clearances
After proper installation, verify that the minimum air clearances between non-insulated parts
are maintained. Be aware of any protruding wire ends.
Table 6- 2 Minimum air clearance dependent on rms value of the alternating voltage Urms
installation altitude of up to 2000 m.
rms
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Electrical connection
①
②
Nut
O ring
①
②
Nut
O ring
6.3 Connecting the motor
6.3.2 Cable glands
Cable glands with (sheet metal) nuts (EN 50262)
Cable glands with reductions and (sheet metal) nuts (EN 50262)
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Electrical connection
②
③
O ring
Mounting
②
O ring
6.3 Connecting the motor
Mounting position of sheet metal nuts in screw-type connections
Cable glands with connecting thread in the terminal box (EN 50262)
position of metal-sheet nuts
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Electrical connection
mm²
[mm²]
[mm²]
S ≤ 25
S
25 < S ≤ 50
25
S > 50
0.5 S
6.4 Connecting the grounding conductor
6.3.3 Tightening torques
Note the information in Chapter "Tightening torques (Page 119)".
Cable entries, sealing plugs and thread adapters
Note the following when mounting:
• Avoid damaging the cable jacket.
• Adapt the tightening torques to the cable jacket materials.
Observe the documentation for tightening torques of the cable entries and sealing plugs for
direct mounting at the motor as well as additional glands (e.g. adapters).
6.4 Connecting the grounding conductor
The motor's grounding conductor cross-section must comply with EN / IEC 60034-1.
Please also observe installation regulations such as those specified in EN / IEC 60204-1.
Basically, there are two ways of connecting a grounding conductor to the motor.
• Internal grounding with a connection in terminal box at the location intended for this
purpose and marked accordingly.
• External grounding with connection at the stator housing at the locations intended for
this purpose and marked accordingly.
Type of enclosure grounding Conductor cross-section
Connection of an individual conductor under
the external grounding bracket.
Connection is made using a DIN cable lug under
the external grounding bracket. DIN 46 234
Table 6- 3 Minimum cross-sectional area of grounding conductor
Minimum cross-section of the phase conductor
for installation
S
Minimum cross-section of the associated
grounding connection
… 10
… 25
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Electrical connection
WARNING
6.5 Connecting a temperature sensor/anti-condensation heater
Internal ground terminal
When making connections, ensure the following:
• Ensure that the connecting surface is bare and is protected against corrosion using a
suitable substance, e.g. acid-free Vaseline.
• Arrange the flat washer and spring washer under the bolt head.
• Locate the cable lug under the clamping bracket.
• Use the terminals designated for the grounding conductor in the terminal box.
• Observe the tightening torque for the locking screw.
External ground terminal
When making connections, ensure the following:
• Ensure that the connecting surface is bare and is protected against corrosion using a
suitable substance, e.g. acid-free Vaseline.
• Position the cable lug between the contact bracket and the grounding bracket; do not
remove the contact bracket pressed into the enclosure!
• Arrange the flat washer and spring washer under the bolt head.
• Use the marked connection location for the grounding conductor on the stator housing.
• Observe the tightening torque for the locking screw.
6.5 Connecting a temperature sensor/anti-condensation heater
Hazard due to electric shock
The installation of the temperature sensors for the winding monitoring with respect to the
winding is implemented according to the requirements for basic insulation. The
temperature sensor connections are located in terminal boxes, safe to touch, and have no
protective separation. This is the reason that in the case of a fault, a hazardous voltage can
be present at the measuring sensor cable. When touched, this can result in death, severe
bodily injury and material damage.
• When connecting the temperature sensor to external temperature monitoring devices,
when required, apply additional measures to fully comply with the requirements set out
in IEC 60664-1 or IEC 61800-5-1 "Hazard due to electric shock".
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Electrical connection
Terminal block connection
Shaft height
Max. connectable conductor cross-section
[mm²]
71 ... 90
1.5
2.5 with cable lug
100 ... 112
4.0
132
6.0
160 ... 180
16.0
200
25.0
225
35.0 with cable lug
250 ... 280
120.0
315
240.0
6.6 Conductor connection
Connecting optional integrated devices and equipment
In addition to the current-dependent overload protective device located in the connecting
cables, use the optionally available integrated devices and equipment, for example,
temperature sensors, anti-condensation heating.
Depending on the terminal box version, connect the auxiliary circuits to the terminal box.
6.6 Conductor connection
Cross-sections that can be connected depending on the size of the terminal (possibly reduced
due to size of cable entries)
Table 6- 4 Max. conductor connection
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Electrical connection
[mm²]
①
②
③ Motor connecting cable
NOTICE
6.6 Conductor connection
6.6.1 Type of conductor connection
Terminal board Max. conductor cross-section
Connection with cable lug
DIN 46 234
Bend down the cable lug for the connection.
25
Connection of an individual conductor with
terminal clamp copper cable
Connecting bar
Line supply cable
6.6.2 Connecting aluminum conductors
If you are using aluminum conductors, then comply with the following:
• Use only cable lugs that are suitable for connecting aluminum conductors.
• Immediately before inserting the aluminum conductor, remove the oxide layer from the
contact areas on the conductor and/or the mating piece. Do this using a brush or file.
• Then grease the contact areas immediately using neutral Vaseline. This prevents a new
oxide layer from forming.
Aluminum flow due to contact pressure
Aluminum flows following installation due to the contact pressure. The connection using
clamping nuts can loosen as a result. The contact resistance increases, obstructing the
current from being conducted. This can result in fire and material damage to the motor –
or even in total failure, as well as material damage to the plant or system due to motor
failure.
• Retighten the clamping nuts after approximately 24 hours and then again after
approximately four weeks. Make sure that the terminals are de-energized before you
tighten the nuts.
10
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Electrical connection
NOTICE
Maximum peak voltage at the motor terminals
Vpk
Vpk
V
≤ 500 V
1500
1100
750
Maximum peak voltage at the motor terminals
Û
Vpk
Û
Vpk
DC link UDC
V
≤ 500 V
1600
1400
750
> 500 V to 690 V
2200
1500
1080
Step height
V
Minimum rise time tr
ns
900
100
1050
200
1260
400
6.7 Connecting converters
6.7 Connecting converters
Material damage caused by an excessively high supply voltage
Material damage can occur if the supply voltage is too high for the insulation system.
• Observe the values in the following tables.
SIMOTICS motors can be operated with SINAMICS G converters and SINAMICS S converters
(uncontrolled and controlled infeed) when maintaining the permissible peak voltages.
The insulation system of SIMOTICS motors corresponds to the specifications laid down in IEC
60034-18-41 according to voltage stress category B (IVIC B = high stress).
Table 6- 5 Maximum voltage peaks at the motor terminals for line (DOL) motors, converter operation possible
Rated motor voltage
V
Table 6- 6 Maximum voltage peaks at the motor terminals for motors specifically designed for converter operation (e.g.
VSD 10)
Rated motor voltage
V
Ûphase-to-phase
phase-to-phase
Ûphase-to-ground
phase-to-ground
DC link UDC
Depending on the step height, the voltage rise times for the individual voltage steps in the
line-to-ground voltage at the motor end of the cable must not fall below the following values.
Table 6- 7 Rise times as a function of voltage level
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6.8 Final checks
6.8 Final checks
Before closing the terminal box/terminal base of the motor enclosure, check the following:
• Establish the electrical connections in the terminal box in accordance with the information
in this documentation.
• Maintain the air clearances between non-insulated parts as described in Chapter
"Minimum air clearances (Page 62)".
• Avoid protruding wire ends.
• In order not to damage the cable insulation, freely arrange the connecting cables.
• Connect the motor corresponding to the specified direction of rotation.
• Keep the inside of the terminal box clean and free from trimmed-off ends of wire.
• Ensure that all seals and sealing surfaces are undamaged and clean.
• Correctly and professionally close unused openings in the terminal boxes. Observe the
information in this documentation.
• Observe the information on torques in this documentation.
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7
Note
Service Center
Please contact the Service Center if you require commissioning support.
WARNING
Commissioning
Observe the following when carrying out any work on the motor:
• Comply with the general safety instructions (Page 11).
• Comply with the applicable national and sector-specific regulations.
• When using the motor within the European Union, comply with the specifications laid
down in EN 50110-1 regarding safe operation of electrical equipment.
7.1 Measures before commissioning
Risk of injury due to the ejected feather key
During motor test run in a no-load condition, the feature key fitted on the decoupled shaft
extension may be flung out if the key is not secured or if unintentional motor movements
occur. These can result in severe injury.
• Before switching on the motor, ensure that the motor is firmly fixed to the foundation.
• Before switching on the motor, ensure that the feather key is carefully secured with a
suitable locking element.
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Commissioning
Note
The voltage in RTD terminals can be induced due to the magnetic interference between
the power cables and the signal cables. Therefore, the signals received can be false.
Touching the terminals directly can result in injury.
7.1 Measures before commissioning
7.1.1 Checks to be carried out prior to commissioning
The following list of checks to be performed prior to commissioning does not claim to be
complete. It may be necessary to perform further checks and tests in accordance with the
specific situation on-site.
Once the system has been correctly installed, you should check the following prior to
commissioning:
• The motor is undamaged.
• The motor has been properly installed and aligned.
• The output transmission elements are set correctly for their type,
e.g. alignment and balancing of couplings, belt forces in the case of a belt drive, tooth
forces and tooth-flank backlash in the case of geared output, radial and axial clearance in
the case of coupled shafts.
• All fixing screws, connection elements, and electrical connections have been tightened to
the specified tightening torques.
• The operating conditions match the data provided in accordance with the technical
documentation, such as degree of protection, ambient temperature, etc.
• Moving parts, for example the coupling, move freely.
• All touch protection measures for both moving and live parts have been implemented.
• Screwed-in lifting eyes are removed after installation or secured to prevent them from
becoming loose.
• Before commissioning, attach the covers to guarantee the correct air guidance.
• Ensure that all condensation drain holes are always located at the lowest part of the
motor.
• Comply with the EMC guidelines when using the PT100/PT1000 sensors to ensure the
correct feedback signals from the sensors.
Second shaft extension
If the second shaft extension is not used:
• Carefully secure the feather key to prevent it from being thrown out, and for balancing
type "H" (standard type), ensure its weight is reduced to approximately 60 % of the
original value.
• Using covers, carefully secure the unused shaft extension so that it cannot be touched.
Risk of losing the IP degree of protection as a result of damaged shaft sealing rings
This can result in death, serious injury, or material damage.
• Replace damaged components immediately.
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Commissioning
7.1 Measures before commissioning
7.1.2 Mechanical and electrical check
• Rotate the rotor to ensure that it does not touch the stator.
• Ensure that the bearing insulation is not bridged/jumpered.
• Using the appropriately designed and adjusted control and speed monitoring functions
ensure that the permissible speeds specified on the rating plate cannot be exceeded.
• Ensure that any supplementary equipment used to monitor the motor is correctly
connected and is functioning.
Electrical connection
• Carefully check the grounding and potential bonding connections.
• Connect the motor corresponding to the specified direction of rotation.
• Using the appropriate open-loop control and speed monitoring functions, carefully ensure
that no higher speeds can be achieved than are permitted and specified in the technical
data. For this purpose, compare the data on the rating plate or, if necessary, the systemspecific documentation.
• Comply with the minimum insulation resistances.
• Comply with the minimum air clearances.
• Correctly connect possibly available motor monitoring devices and equipment - and
carefully ensure that they are functioning correctly.
• Check the correct functioning of the brakes or backstops.
• Set the values for "Alarm" and "Shutdown" at the monitoring devices.
• Carefully ensure that temperature-sensitive parts and components, e.g. cables are not in
contact with the motor enclosure.
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Commissioning
7.1 Measures before commissioning
7.1.3 Converter operation
• If the motor design requires connection to a specific converter type, carefully check the
supplementary data on the rating plate/supplementary plate.
• Ensure that the converter is correctly parameterized. Depending on the design, you will
find some parameterization data on the rating plate of the motor. Further information is
provided in the converter documentation. If necessary, contact the Service Center.
• Check that the supplementary equipment and devices to monitor the motor are correctly
connected and are functioning correctly.
• In continuous operation, carefully ensure that the motor cannot exceed the specified
upper speed limit n
max or fall below the lower speed limit nmin.
The permissible acceleration time to the limit speed n
assignment.
7.1.4 Insulation resistance and polarization index
Measuring the insulation resistance and polarization index (PI) provides information on the
condition of the motor. It is therefore important to check the insulation resistance and the
polarization index at the following times:
• Before starting up a motor for the first time
• After an extended period in storage or downtime
• Within the scope of maintenance work
The following information is provided regarding the state of the winding insulation:
• Is the winding head insulation conductively contaminated?
• Has the winding insulation absorbed moisture?
As such, you can determine whether the motor needs commissioning or any necessary
measures such as cleaning and/or drying the winding:
• Can the motor be put into operation?
• Must the windings be cleaned or dried?
min depends on the parameter
Detailed information on testing and the limit values can be found here:
Checking the insulation resistance (Page 45)
7.1.5 Testing the cooling of the motor
Check that the motor cooling is available for commissioning.
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Commissioning
Note
Use these operating instructions for motors with separately driven fans.
7.1 Measures before commissioning
7.1.6 Commissioning a separately driven fan
The separately driven fan ensures that the motor is cooled irrespective of the motor speed or
direction of rotation. The separately driven fan is only suitable for one direction of rotation.
Checks before the first test run
Before the first test run, carry out the following checks:
• The separately driven fan is correctly fitted and aligned.
• The rotor runs freely.
• All of the retaining elements and electrical connections are securely tightened.
• The grounding and equipotential bonding connections to the mains have been correctly
made.
• The air flow is not impeded or shut off by flaps, covers or similar.
• If the cooling air is in open circulation, it has only weak, chemically abrasive properties
and a low dust content.
• All protection measures have been taken to prevent accidental contact with moving or live
parts.
Performing the test run
1. Switch the separately driven fan motor on and off briefly.
2. Compare the direction of rotation of the separately driven fan with the specified direction of
rotation. The direction of rotation of the separately driven fan is indicated with an arrow on
the fan cover specifying the direction of rotation or with a terminal designation on the
rating plate of the separately driven fan.
Depending on the version, the fan impeller is visible through the air inlet opening in the
fan cover on the separately driven fan motor.
3. If the direction of rotation is wrong, then interchange two line cables in the separately
driven fan motor terminal box.
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Commissioning
Note
Further documents
Observe all of the other documents provided with this motor.
Set value
Temperature
Alarm
115 °C
Shutting down
120 °C
Set value
Temperature
Alarm
Toperation + 5 K ≤ 115 °C
Shutting down
Toperation + 10 K ≤ 120 °C
7.1 Measures before commissioning
7.1.7 Further documents
7.1.8 Setpoint values for monitoring the bearing temperature
Prior to commissioning
If the motor is equipped with bearing thermometers, set the temperature value for
disconnection on the monitoring equipment before the first motor run.
Table 7- 1 Set values for monitoring the bearing temperatures before commissioning
Normal operation
Determine the maximum operating temperature of the bearings Toperation taking into account
the temperature, bearing load and influences of the plant on the motor in °C. Set the values
for shutdown and warning corresponding to the operating temperature T
Table 7- 2 Set values for monitoring the bearing temperatures
op.
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Commissioning
NOTICE
7.2 Switching on
7.2 Switching on
Measures for start-up
After installation or inspections, the following measures are recommended for normal startup of the motors:
• Start the motor without a load. To do this, close the circuit breaker and do not switch the
motor off prematurely. Switching the motor off again while it is starting up and still
running at slow speed should be kept to a bare minimum, for example for checking the
direction of rotation or for checking in general. Allow the motor to run to a standstill
before switching it back on again.
• Check mechanical operation for noise or vibration at the bearings or end shields.
• If the motor is not running smoothly or is emitting abnormal noises, switch it off, and
determine the cause of the fault as it runs down.
• If mechanical operation improves immediately after the motor is switched off, then the
cause is magnetic or electrical, e.g. voltage imbalance, magnetic imbalance. If mechanical
operation does not improve immediately after switching the motor off, then the cause is
mechanical, e.g. an imbalance in the electrical motors or in the driven machine,
inadequate alignment of the machine set, operation of the motor with the system
resonating (system = motor + base frame + foundations etc.).
• If the motor runs perfectly in terms of its mechanical operation, switch on any cooling
devices present and continue to monitor the motor for a while as it idles.
• If it runs perfectly, connect a load. Check that it runs smoothly.
Read off and document the values for voltage, current, and power.
Where possible, read off corresponding values for the driven machine and document
them as well.
• Monitor the bearing temperature, winding temperature, etc. until the system reaches a
steady state.
Document these, provided this is possible with existing measuring instruments.
Damage of the motor
The motor may get damaged if the vibration values are not strictly complied with.
• In operation, maintain vibration values in accordance with DIN ISO 10816-3.
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Commissioning
NOTICE
NOTICE
7.2 Switching on
Test run
After installation or inspection, carry out a test run:
1. Start up the motor without a load. To do this, close the circuit breaker and do not switch off
prematurely. Check whether it is running smoothly.
Switching the motor off again while it is starting up and still running at slow speed should
be kept to a bare minimum, for example for checking the direction of rotation or for
checking in general.
Allow the motor to run down before switching it on again.
2. If the motor is running smoothly and evenly, switch on the cooling equipment. Continue to
observe the motor for a while in no-load operation.
3. If it runs perfectly, connect a load.
Thermal overload of motors connected directly to the line supply
In addition to the load torque, the ramp-up (accelerating) time is essentially influenced
by the moment of inertia to be accelerated. While ramping up when connected to the
line supply, the inrush (starting) current is a multiple of the rated current. This can result
in thermal overload. This can damage the motor.
As a consequence, when ramping up, observe the following:
• Monitor the ramp-up time and number of consecutive starts.
• Comply with the limit values and/or ramp-up conditions specified in the catalog or the
order documentation.
4. During the test run, check and document the following:
– Check whether it is running smoothly.
– Document the voltage, current and power values. As far as possible, document the
corresponding values of the driven machine.
– If this is possible using the available measuring equipment, check the bearing and
stator winding temperatures until they have reached steady-state values.
– Check the motor for noise or vibrations on the bearings or bearing shields as it runs.
5. In case of uneven running or abnormal noise, switch off the motor. As the motor runs down,
identify the cause.
– If the mechanical operation improves immediately after the motor is switched off, then
the cause is magnetic or electrical.
– If the mechanical running does not improve immediately after switching the motor off,
then the cause is mechanical.
- Imbalance of the electrical motor or the driven machine
- The machine set has not been adequately aligned
- The motor is being operated at the system resonance point. System = motor, base
frame, foundation, ...
Serious damage to the motor
If the vibration values in operation are not maintained in accordance with DIN ISO
10816-3, then the motor may get damaged.
• During operation, observe the vibration values in accordance with
DIN ISO 10816-3.
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8
Operation
Observe the following when carrying out any work on the motor:
• Comply with the general safety instructions (Page 11).
• Comply with the applicable national and sector-specific regulations.
• When using the motor within the European Union, comply with the specifications laid
down in EN 50110-1 regarding safe operation of electrical equipment.
8.1 Safety instructions for operation
Hazardous voltages at the motor
Electrical motors have hazardous voltage levels. Contact with these can result in death,
serious injury or material damage.
Operating the motor on a line supply system with a non-grounded neutral point is only
permissible for short periods of time that occur rarely, e.g. the time leading to a fault being
eliminated. Cable ground fault EN / IEC 60034-1.
Risk of injury due to rotating parts
Rotating parts are dangerous. Touch protection against rotating parts is no longer guaranteed
if covers are removed. Touching rotating parts can result in death, serious injury or material
damage.
• Carefully ensure that all of the covers are closed while operational.
• First switch off and disconnect the motor if you must remove covers. Carefully comply
with the "5 safety rules".
• Only remove the covers when the rotating parts have come to a complete standstill.
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Operation
8.1 Safety instructions for operation
Danger as a result of stationary parts under voltage (live parts)
Live parts represent a hazard. Touch protection against active (live) parts is no longer
guaranteed if covers are removed. The minimum air and creepage distances may be fallen
below (violated) when coming close to active parts. Touching or coming close can result in
death, serious injury or material damage.
• Carefully ensure that all of the covers are closed while operational.
• First switch off and disconnect the motor if you must remove covers. Carefully comply
with the "5 safety rules".
• When the motor is in operation, the terminal boxes must remain closed at all times.
Terminal boxes may be opened only when the motor is stopped and in a no-voltage
condition.
Faults in operation
Any changes with respect to the normal condition can indicate that the motor is not
functioning correctly.
• Higher power consumption, temperatures or vibration levels.
• Unusual noise or smells.
• Monitoring devices respond.
These changes can cause faults which can result in eventual or immediate death, serious
injury or material damage.
• Immediately inform the service personnel.
• If you are in doubt, immediately switch off the motor, carefully observing the systemspecific safety conditions.
Corrosion damage as a result of condensation
Humidity can condense inside the motor if the motor and/or ambient temperatures fluctuate,
for intermittent operation or load fluctuations.
Condensation can accumulate. Moisture can have a negative impact on the winding
insulation or result in damage, such as corrosion.
• Ensure that any condensation can freely flow away.
• If available, remove the screw plugs to drain the water depending on the ambient and
operating conditions.
• If available, reinsert the screw plugs.
If the motor is equipped with drain plugs, then the water can drain away by itself.
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Operation
8.1 Safety instructions for operation
Risk of burn injuries as a result of hot surfaces
Individual motor parts can become hot in operation. Burns can result when coming into
contact with these parts.
• Never touch motor parts during operation.
• Allow the motor to cool down before starting work.
• Check the temperature of parts before touching them. If required, wear suitable protective
equipment.
Hazardous substances
Chemical substances required for the setup, operation and maintenance of motors can
present a health risk. Poisoning, skin damage, cauterization of the respiratory tract, and other
health damage may result.
• Read the information in these operating instructions and the product information supplied
by the manufacturer.
• Observe the relevant safety regulations and wear the personal protective equipment
specified.
Substances that can be easily ignited and are flammable
Chemical substances required for the setup, operation and maintenance of motors may be
flammable. Burns and other damage to health and material may result.
• Read the information in these operating instructions and the product information supplied
by the manufacturer.
• Observe the relevant safety regulations and wear the personal protective equipment
specified.
Damage to the motor or premature bearing failure
The bearings can be damaged if the following is not observed.
• It is absolutely crucial that you maintain the permissible vibration values according to ISO
10816-3 to avoid damage to the motor or even its destruction.
• Under all circumstances maintain the minimum radial load of cylindrical rolling bearings of
50 % corresponding to what is specified in the catalog.
• Take the appropriate measures to reduce bearing currents. Comply with the information
in Chapter "Converter operation (Page 39)".
Overheating as a result of the anti-condensation heating
If the anti-condensation heating is operated while the motor is operational, this can increase
the temperatures inside the motor and cause material damage.
• Install an interlock circuit that switches off the anti-condensation heating once the main
motor is switched on.
• Only switch on the anti-condensation heating after the motor has been switched off.
Comply with the data stamped on the plate of the anti-condensation heating, if available.
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Operation
WARNING
CAUTION
8.1 Safety instructions for operation
8.1.1 Safety instructions relating to ventilation and cooling
8.1.1.1 Safety instructions for forced ventilation (option)
Forced ventilation (optional): Type of cooling IC 416 in accordance with EN / IEC 60034-6
Risk of burning
Operating the motor without a separately driven fan results in overheating. This may result
in death, personal injury and material damage.
• Never commission the motor without a separately driven fan.
8.1.1.2 Safety instructions when operating motors with fan
Risk of injury when touching the fan
There is a risk of injury at motors equipped with a fan cover (e.g. on motors in the textile
industry), as the fan is not completely touch protected.
• Do not touch the rotating fan.
• Do not put your fingers into the larger air discharge openings.
• Prevent manual intervention by using suitable measures, e.g. appropriate housings or a
protective grating.
8.1.1.3 Motors with fan for the textile industry
In order to guarantee an essentially unobstructed flow of cooling air containing fluff, remains
of materials or similar dirt, motors used in the textile industry have a larger air discharge
cross-section between the edge of the cover and the cooling ribs of the motor frame.
These motors have a warning sticker on the fan cover.
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Operation
NOTICE
8.2 Switching on the motor
8.2 Switching on the motor
1. If at all possible, run the motor without load and check that it is running smoothly.
2. If it runs perfectly, connect a load.
Thermal overload of motors connected directly to the line supply
In addition to the load torque, the ramp-up (accelerating) time is essentially influenced
by the moment of inertia to be accelerated. While ramping up when connected to the
line supply, the inrush (starting) current is a multiple of the rated current. This can result
in thermal overload. This can damage the motor.
As a consequence, when ramping up, observe the following:
• Monitor the ramp-up time and number of consecutive starts.
• Comply with the limit values and/or ramp-up conditions specified in the catalog or the
order documentation.
3. If this is possible using the available measuring equipment, check the bearing and stator
winding temperatures.
8.3 Deactivating
Commission any devices provided for protection against condensation after switching off the
motor.
Do not immediately switch off the separately driven (external) fan after switching off the
motor. First wait for the motor to cool down. This will prevent the accumulation of residual
heat.
8.4 Switching on again after an emergency switching-off
• Check the motor before recommissioning the driven machine after an Emergency Off.
• Eliminate all the causes that have led to the emergency off
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Operation
NOTICE
NOTICE
8.5 Stoppages
8.5 Stoppages
The stoppage is a shutdown for a period of time, during which the motor is stopped but
remains at the location of use.
Under normal ambient conditions, e.g. the stationary motor not exposed to any vibration, no
increased level of corrosion, the following measures are required.
Longer non-operational periods
• For longer non-operational periods (> 1 month), either operate the motor or at least turn
the rotor regularly, approximately once per month.
• If attached, remove the rotor shipping brace before you turn the rotor.
• Carefully comply with the information in Section "Switching on" before switching on to
recommission the motor.
Restricted motor function
If not used for longer periods of time, material damage or complete motor failure can occur.
If the motor is out of service for a period of more than 12 months, then environmental
effects can damage the motor.
• Apply suitable corrosion protection, preservation, packaging and drying measures.
Switching on the anti-condensation heating, if available
Only switch on the anti-condensation heating after the motor has been switched off. Comply
with the data stamped on the plate of the anti-condensation heating, if available.
Taking the motor out of service
Detailed information on how to take the motor out of service is provided in Chapter
"Preparing for use (Page 25)".
Lubricating before recommissioning
Dry running bearings
Bearings can be damaged if they do not have sufficient grease.
• Re-grease the bearings if they have been out of service for more than one year. The shaft
must rotate so that the grease can be distributed in the bearings. Follow the instructions
on the lubricant plate.
• "More information can be found in Chapter Rolling bearings (Page 98)".
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Operation
8.5 Stoppages
8.5.1 Avoidance of damage to rolling bearings during stoppages
Extended stoppages at the identical or almost identical resting position of the rotor in the
rolling bearings can result in damage, such as brinelling or corrosion.
• During stoppages, regularly start up the motor for a brief period once a month. As a
minimum, turn the rotor several times.
If you have uncoupled the motor from the driven machine and secured the rotor with a
rotor shipping brace, then remove this before turning the rotor over or starting up the
motor.
Make sure that the resting position of the rotor after the rotor has been turned over is
different from its previous position. Use the fitted key or the coupling halves as reference
markers.
• When recommissioning, carefully comply with the information in Chapter "Commissioning
(Page 71)".
8.5.2 Decommissioning the motor
• Record the decommissioning steps. This log will be useful upon recommissioning.
• If the motor is going to be out of service for longer than six months, then take the
necessary measures for preservation and storage. Otherwise, the motor could be
damaged as a result of not being operated.
8.5.3 Re-commissioning the motor
When you re-commission the motor, proceed as follows:
• Study the record made when the motor was decommissioned, and reverse the measures
that were taken for conservation and storage.
• Perform the measures listed in Chapter "Commissioning (Page 71)".
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Operation
Note
If you are operating the motor with a converter, the operating instructions of the converter
must also be observed if electrical faults occur.
↓ Motor fails to start
↓ Motor accelerates sluggishly
↓ Rumbling noise during startup
↓ Rumbling noise during operation
↓ High temperature rise during no-load operation
↓ High temperature rise with load
↓ High temperature rise of individual winding sections
Possible causes of faults
Remedial measures
X X X X
Overload
Reduce the load.
X
Interrupted phase in the supply cable
Check the switches and cables.
X X X X
Interrupted phase in the feeder cable after
switching on
Check the switches and cables.
X
Mains voltage too low, frequency too high
Check the power supply conditions.
X
Mains voltage too high, frequency too low
Check the power supply conditions.
X X X X X
Stator winding incorrectly connected
Check the winding connection in the terminal box.
X X X X
Winding short circuit or phase short circuit
Determine the winding resistances and insu-
after consultation with the manufacturer.
X
Incorrect direction of rotation
Check the connection.
8.6 Faults
8.6 Faults
8.6.1 Inspections in the event of faults
Natural disasters or unusual operating conditions, such as overloading or short circuit, are
faults that overload the motor electrically or mechanically.
Immediately perform an inspection after such faults.
Correct the cause of the fault as described in the respective remedial measures section.
Repair any damage to the motor.
8.6.2 Electrical faults
Table 8- 1 Electrical faults
in stator winding
lation resistances. Carry out repair work
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Operation
↓ Grinding noise
↓ Radial vibrations
↓ Axial vibrations
Possible causes of faults
Remedial measures
X
Rotating parts grind
Establish the cause and realign the parts.
Rotor or coupling not balanced.
Disconnect the rotor or coupling and rebalance.
If the motor has two shaft ends, and a transmission element is only
type), the fitted key must be cut back to roughly half of its length.
X
Rotor out of round, shaft bent
Consult the manufacturing plant.
X
X
Poor alignment
Align the machine set; check the coupling.
(1)
X
Coupled machine not balanced
Rebalance the coupled machine.
X
Shocks from coupled machine
Investigate the coupled machine.
X
X
Uneven running of gear unit
Fix the gearing.
X
X
Resonance of the overall system
comprising motor and foundation
Stabilize the foundation following consultation.
X
Changes in foundation
Establish the cause of the changes and eliminate them if necessary;
realign the motor.
(1)
Take any changes into account when warming up the motor.
↓ Bearing overheats
↓ Bearing "whistles"
↓ Bearing "knocks"
Possible causes of faults
Remedial measures
X
High coupling pressure
Align the motor more accurately.
X
Belt tension too high
Reduce the drive belt tension.
X
Bearing contaminated
Clean or replace the bearing. Check the seals.
X
High ambient temperature
Use a suitable high-temperature grease.
X
X Insufficient lubrication
Grease the bearings as instructed.
X
X Bearing canted
Contact the service center.
X
X Insufficient bearing play
Contact the service center.
X Excessive bearing play
Contact the service center.
X
X Bearing corroded
Replace the bearing. Check the seals.
X
Too much grease in bearing
Remove surplus grease.
X
Wrong grease in the bearing
Use the correct grease.
X Friction marks on raceway
Replace the bearing.
X Brinelling or scoring
Replace the bearing. Avoid any vibration at standstill
8.6 Faults
8.6.3 Mechanical faults
Table 8- 2 Mechanical faults
X
fitted to one end, secure the fitted key at the other end to prevent it
from being thrown out. If the rotor has balance type "H" (standard
X
8.6.4 Rolling bearing faults
Damage to rolling bearings can be difficult to detect in some cases. If in doubt, replace the
rolling bearing. Use other bearing designs only after consulting the manufacturer.
Table 8- 3 Rolling bearing faults
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Operation
↓ High temperature rise with load
Possible causes of faults
Remedial measures
X
Wrong direction of rotation of the separately
driven fan
Check the electrical connections to the separately driven fan.
X
separately driven fan is not running
Check the separately driven fan and its connections.
X
Reduced air flow
Check the air ducts; clean the motor.
8.6 Faults
8.6.5 Faults on the separately driven fan
The following table shows the possible causes of and remedial measures for faults on forcedventilated motors.
Table 8- 4 Cooling system faults
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9
Note
Please contact the Service Center (Page
maintenance or repair.
Note
Paint system
Contact the Service
provide you with more information about the correct paint system and methods of repairing
paint damage.
Maintenance
Through careful and regular maintenance, inspections, and overhauls you can detect faults at
an early stage and resolve them. This means that you can avoid consequential damage.
Operating conditions and characteristics can vary widely. For this reason, only general
maintenance intervals can be specified here. Maintenance intervals should therefore be
scheduled to suit the local conditions (dirt, starting frequency, load, etc.).
Observe the following when carrying out any work on the motor:
• Comply with the general safety instructions (Page 11).
• Comply with the applicable national and sector-specific regulations.
• When using the motor within the European Union, comply with the specifications laid
down in EN 50110-1 regarding safe operation of electrical equipment.
9.1 Preparation and notes
Touch up any damaged paintwork
If the paint is damaged, it must be repaired in order to protect the unit against corrosion.
Center (Page 117) before you repair any damage to paint. They will
117), if you require support with service,
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Maintenance
9.2 Inspection and maintenance
9.2 Inspection and maintenance
9.2.1 Safety instructions for inspection and maintenance
Danger as a result of stationary parts under voltage (live parts)
Live parts represent a hazard. Touch protection against active (live) parts is no longer
guaranteed if covers are removed. The minimum air and creepage distances may be fallen
below (violated) when coming close to active parts. Touching or coming close can result in
death, serious injury or material damage.
• Take the motor out of operation.
• Switch off the motor and ensure that it is in a no-voltage condition. Carefully comply with
the "5 safety rules" (Page 11).
• Only open the terminal box when the motor is stationary and in a no voltage condition.
Risk of injury due to rotating parts
Rotating parts are dangerous. Touch protection against rotating parts is no longer guaranteed
if covers are removed. Touching rotating parts can result in death, serious injury or material
damage.
• Before carrying out any repair work on the motor, take it out of operation, and carefully
lock it out so that it cannot be switched on again.
• Only remove the covers when the rotating parts have come to a complete standstill.
Risk of burn injuries due to hot surfaces
In operation, the temperature of individual motor parts can increase - and only decrease
slowly after switching off. You can burn yourself if you touch hot surfaces.
• Allow the motor to cool before starting any maintenance and service work on the motor.
• Check the temperature of parts before touching them. If required, wear suitable protective
equipment.
Danger when cleaning using compressed air
When cleaning parts of the motor using compressed air, loose parts or particles of dirt can be
flung around and cause injury.
• Installed suitable extraction measures.
• Wear personal protective equipment, such as protective glasses, gloves, overall.
• Ensure that personnel not involved in the work are not in the danger area.
Damage if the motor is not maintained
The motor can be damaged if it is not appropriately maintained. This can cause faults which
can result in eventual or immediate death, serious injury or material damage.
• Maintain the motor at the specified maintenance intervals.
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Maintenance
Note
Inspection specifications
•
•
Check
When the motor is running
At standstill
The electrical parameters are maintained.
X
The permissible bearing and winding temperatures are
not exceeded (Page 76).
X
The smooth running characteristics and motor running
noise have not deteriorated.
X
The foundation has no cracks or indentations. (*)
X
X
(*) You can perform these checks while the motor is running or at a standstill.
NOTICE
motor.
9.2 Inspection and maintenance
Damage from foreign bodies in the motor
Foreign bodies such as dirt, tools or loose components can be left by accident inside the
motor after maintenance is performed. These can cause short circuits, reduce the
performance of the cooling system or increase noise in operation. They can also damage the
motor.
• Ensure that no foreign bodies are left in or on the motor.
• Securely attach all loose parts once you have completed the work.
• Carefully remove any dirt.
9.2.2 Inspections in the event of faults
Natural disasters or unusual operating conditions, such as overloading or short circuit, are
faults that overload the motor electrically or mechanically.
Immediately perform an inspection after such faults.
Carefully comply with the relubrication intervals for rolling bearings that deviate from the
inspection intervals.
When servicing a three-phase motor, it is generally not necessary to dismantle it. The
motor only has to be dismantled if the bearings are to be replaced.
9.2.3 First inspection after installation or repair
Perform the following checks after approximately 500 operating hours or at the latest six
months after commissioning:
Table 9- 1 Checks after assembly or repair
Additional tests may also be required according to the system-specific conditions.
Motor damage
When carrying out the inspection, if you detect any impermissible deviations from the
normal state, you must rectify them immediately. They may otherwise cause damage to the
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Maintenance
tor is running
The electrical parameters are maintained
X
The permissible bearing temperatures are not exceeded
X
The smooth running characteristics and motor running noise
have not deteriorated
X
The foundation has no cracks or indentations. (*)
X
X
The motor is aligned within the permissible tolerance ranges
X
All the fixing bolts/screws for the mechanical and electrical connections have been securely tightened
X
All the potential connections, grounding connections and shield
supports are correctly seated and properly bonded
X
The winding insulation resistances are sufficiently high
X
Any bearing insulation is fitted as shown on the plates and labels
X
The CABLES and insulating parts and components are in good
condition and there is no evidence of discoloring
X
(*) You can perform these checks while the motor is at standstill or, if required, while running.
NOTICE
9.2 Inspection and maintenance
9.2.4 General inspection
Check that the installation conditions are observed. We recommend that the following checks
are performed after approx. 16 000 operating hours or at the latest after two years:
Table 9- 2 Checks that have to be performed during the general inspection
Checking When the mo-
At standstill
Motor damage
When carrying out the inspection, if you detect any impermissible deviations from the
normal state, you must rectify them immediately. They may otherwise cause damage to the
motor.
9.2.5 Assessing the rolling bearings
To assess the rolling bearings, it is generally not necessary to dismantle the motors. The
motor only has to be dismantled if the bearings are to be replaced.
The state of a rolling bearing can be assessed by analyzing the bearing vibration. The
measured values provide an indication and can be assessed by specialists. In this case, please
contact the Service Center.
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Maintenance
NOTICE
CAUTION
Measures
Operating period intervals
Intervals
Initial inspection
After 500 operating hours
After 1/2 year at the latest
Relubrication (optional)
See the lubricant plate
Clean
Depending on the degree of pollution
Main inspection
Approximately every 16000 operating hours
After two years at the latest
Drain condensate
Depending on the climatic conditions
9.2 Inspection and maintenance
9.2.6 Maintenance intervals
Please note the following in order to identify faults at an early stage, rectify them and avoid
follow-on damage:
• Maintain the motor regularly and carefully.
• Inspect the motor.
• Motors must be allocated a revision/inspection number after inspection.
Motor failure
Material damage can occur if the motor develops faults or is overloaded.
• Immediately inspect the motor if faults occur.
• An immediate inspection is especially necessary, if the three-phase motor is
excessively stressed, either electrically or mechanically (e.g. overload or short-circuit).
The motors are equipped with permanently lubricated rolling bearings. The motor may be
equipped with a regreasing device.
Skin irritations and eye inflammations
Many greases can cause skin irritations and eye inflammations.
• Follow all safety instructions of the manufacturer.
Measures, intervals and deadlines
Measures after operating period intervals or deadlines have elapsed:
Operating situations and characteristics can vary widely. For this reason, only general
maintenance intervals are specified here. Maintenance intervals should therefore be
scheduled to suit the local conditions (dirt, starting frequency, load, etc.).
Table 9- 3 Operating period intervals
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Maintenance
Manufacturer
Grease type
Shell
Shell Gadus S2 V100 3
ExxonMobil/Esso
Unirex N3
ExxonMobil/Esso
Mobilgrease XHP 103
Note
It is not permissible to mix different types of grease. If an
make sure that the old grease has been cleaned from all grease chambers and grease paths
(bearing covers, bearing, grease pipe and grease nipple).
WARNING
Support or relieve the rotor when carrying out work with the motor in a vertical position.
9.2 Inspection and maintenance
9.2.7 Re-greasing
For motors with regreasing system, relubrication intervals, grease quantity and grease grade
are provided on the lubricant plate. Additional data can be taken from the main motor rating
plate.
Grade of grease for standard motors UNIREX N3 - ESSO.
Below are the list of approved greases that can be used:
Table 9- 4 Approved rolling bearing greases for vertical and horizontal types of construction
Procedure
alternative grease is being used,
Prolonged storage periods reduce the useful lifetime of the bearing grease. Check the
condition of the grease if the equipment has been in storage for more than 12 months. If the
grease is found to have lost oil content or to be contaminated, the motor must be
immediately relubricated before commissioning. For information on permanently-greased
bearings, please refer to the section titled Rolling bearings (Page 98).
To relubricate the rolling bearings, proceed as follows:
1. Clean the grease nipples at the drive end and non-drive end.
2. Press-in the specified grease and amount of grease according to the data stamped on the
lubrication plate.
– Please observe the information on the rating and lubricant plates.
– Regreasing should be carried out when the motor is running (max. 3600 rpm).
The bearing temperature can rise significantly at first, and then drops to the normal value
again when the excess grease is displaced out of the bearing.
Rotor can fall out
If the motor is in a vertical position, the rotor can fall out while work is being performed on
the locating bearing. This can result in death, serious injury or material damage.
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Maintenance
9.2 Inspection and maintenance
9.2.8 Cleaning
Cleaning the grease ducts and spent grease chambers
The spent grease collects outside each bearing in the spent grease chamber of the outer
bearing cap. When replacing bearings, remove the spent grease.
Dismantle the bearing cartridges to replace the grease in the lubrication duct.
Cleaning the cooling air ducts
Regularly clean the cooling air ducts through which the ambient air flows.
The frequency of the cleaning intervals depends on the local degree of fouling.
Damage to the motor when cleaning with compressed air or water jets
• Do not direct compressed air or water jets in the direction of the shaft outlet or motor
openings.
• Avoid direct impact of compressed air and water jets on sealing elements of the motor.
9.2.9 Cleaning the fan cover of motors for the textile industry
Regularly remove fluff balls, fabric remnants, and similar types of contamination from the fan
cover of motors for the textile industry (particularly at the air passage opening between the
fan cover and cooling fins of the motor enclosure) to ensure that the cooling air can flow
without obstruction.
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Maintenance
WARNING
NOTICE
9.2 Inspection and maintenance
9.2.10 Drain condensate
If there are condensation drain holes present, open these at regular intervals, depending on
climatic conditions.
Hazardous voltage
The winding can be damaged if objects are introduced into the condensation holes
(optional). This can lead to death, serious injury or material damage.
Note the following to maintain the degree of protection:
• Switch off the motor so that it is in a no-voltage condition before you open the
condensation drain holes.
• Close the condensation drain holes, e.g. using T-plugs, before commissioning the motor.
Reduction of the degree of protection
If condensation drain holes are not closed, then this can result in material damage to the
motor.
In order to maintain the degree of protection, after the condensation has been drained, you
must close all of the drain holes.
9.2.11 Insulation resistance and polarization index
Measuring the insulation resistance and polarization index (PI) provides information on the
condition of the motor. It is therefore important to check the insulation resistance and the
polarization index at the following times:
• Before starting up a motor for the first time
• After an extended period in storage or downtime
• Within the scope of maintenance work
The following information is provided regarding the state of the winding insulation:
• Is the winding head insulation conductively contaminated?
• Has the winding insulation absorbed moisture?
As such, you can determine whether the motor needs commissioning or any necessary
measures such as cleaning and/or drying the winding:
• Can the motor be put into operation?
• Must the windings be cleaned or dried?
Detailed information on testing and the limit values can be found here:
Checking the insulation resistance (Page 45)
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Maintenance
WARNING
9.2 Inspection and maintenance
9.2.12 Servicing the separately driven fan
Injury caused by rotating parts or live (under voltage) parts
Live electrical parts are dangerous. Contact with them can cause death, serious injury or
material damage.
• Before carrying out any maintenance work on the separately driven fan, disconnect it
from the mains, particularly before opening the terminal box.
• Make sure that the device cannot be switched back on.
Servicing the separately driven fan
However, dirt and dust deposits on the impeller and the motor, particularly in the gap
between the impeller and the inlet nozzle can impair its function.
• Remove the dirt and dust deposits regularly; the intervals depend on how dirty the
surrounding area is.
• Make sure that the impeller is cleaned evenly, as irregular deposits can lead to an
imbalance.
• The full air flow can only be achieved when air can freely flow through the impeller.
• There must be a clearance of at least 1 x air intake diameter in the axial direction.
• A uniform gap must be maintained between the impeller and the air intake assembly.
Servicing the separately driven fan motor
• Perform an occasional visual inspection of the separately driven fan motor and check it
electrically and mechanically every time the rolling bearings are replaced.
• Replace the permanently lubricated rolling bearing on the separately driven fan motor
after 40000 operating hours or five years at the latest.
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Maintenance
Note
Before commencing removal, you should mark how each of the fast
assigned, as well as how internal connections are arranged. This simplifies subsequent
reassembly.
9.3 Corrective maintenance
9.3 Corrective maintenance
Observe the following when carrying out any work on the motor:
• Comply with the general safety instructions (Page 11).
• Comply with the applicable national and sector-specific regulations.
• When using the motor within the European Union, comply with the specifications laid
down in EN 50110-1 regarding safe operation of electrical equipment.
If the motor has to be transported, please observe the information and instructions in
Chapter "Transport (Page 29)".
ening elements has been
Avoid damaging the windings protruding out of the stator enclosure when assembling the
end shield.
If possible, assemble the motor on and alignment plate. This ensures that the mounting feet
surfaces are all on the same plane.
Sealing measures
1. Apply the necessary liquid sealant, e.g. Fluid-D, Hylomar, to the centering edge.
2. Check the terminal box seals, and if required, replace these.
3. Repair any damage to the paint, also to screws/bolts.
4. Take the necessary measures to ensure compliance with the applicable degree of protection.
5. Do not forget the foam rubber cover in the cable entry. Completely seal the holes, and
ensure that cables do not come into contact with sharp edges.
9.3.1 Rolling bearings
Refer to the rating plate or the catalog for the designations of the bearings being used.
Bearing lifetime
Prolonged storage periods reduce the useful lifetime of the bearing grease. For permanently
lubricated bearings, this reduces the bearing service life.
We recommend that the grease is replaced after a storage time of 12 months. Replace
greased bearings also in the case of closed bearings (suffix 2Z or 2 RS). After 4 years in
storage, generally replace all rolling bearings and grease.
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